Note 11 - Equity Offerings (Details Textual) $ / shares in Units, $ in Thousands |
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12 Months Ended |
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Dec. 31, 2025
USD ($)
$ / shares
shares
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May 12, 2025
USD ($)
$ / shares
shares
|
Oct. 25, 2024
USD ($)
$ / shares
shares
|
Sep. 03, 2024
USD ($)
$ / shares
shares
|
Aug. 30, 2024
shares
|
Dec. 31, 2025
USD ($)
$ / shares
shares
|
Dec. 31, 2024
USD ($)
$ / shares
shares
|
Aug. 15, 2025
$ / shares
|
Aug. 07, 2025
USD ($)
|
Jun. 13, 2025
USD ($)
|
May 19, 2025
USD ($)
$ / shares
|
| Class of Warrant or Right, Exercised in Period (in shares) |
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|
162,947
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| Proceeds from Warrant Exercises | $ |
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|
$ 0
|
$ 1,185
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| Deemed Dividend on Warrant Inducement Offer | $ |
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$ 5,200
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$ (0)
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$ 5,158
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| Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
$ 0.0001
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$ 0.0001
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$ 0.0001
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| Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
$ 0.0001
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$ 0.0001
|
$ 0.0001
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$ 0.0001
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| Class of Warrant or Right, Issued in Period (in shares) |
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579,098
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| Accrued Liabilities, Current | $ |
$ 1,697
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|
$ 1,697
|
$ 1,548
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| Weighted Average [Member] |
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
$ 17.6
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$ 17.6
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| Common Stock Units [Member] | Underwriting Agreement [Member] |
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| Stock Issued During Period, Shares, New Issues (in shares) |
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24,138
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| Abeyance Shares [Member] |
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|
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| Stock Issued During Period, Shares, Other (in shares) |
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162,947
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|
|
|
|
| Common Stock, Capital Shares Reserved for Future Issuance (in shares) |
0
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0
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| Series B Convertible Preferred Stock [Member] |
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| Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
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$ 0.0001
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| September 2024 Pre-Funded Warrants [Member] |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
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145,943
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| September 2024 Pre-Funded Warrants [Member] | Pre-Funded Units [Member] |
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| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
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1
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
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|
$ 0.0019
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| Units Issued, Warrants Per Unit |
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1
|
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| Series H Warrants [Member] |
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|
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| Class of Warrant or Right, Exercised in Period (in shares) |
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104,737
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| Series H Warrants [Member] | Underwriting Agreement [Member] |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
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24,138
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| Class of Warrant or Right, Maximum Additional for Option (in shares) |
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24,634
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| Series H Warrants [Member] | Common Stock Units [Member] |
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| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
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1
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
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$ 19
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| Warrants and Rights Outstanding, Term (Month) |
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6 months
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| Series H Warrants [Member] | Pre-Funded Units [Member] |
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| Units Issued, Warrants Per Unit |
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1
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| Series I Warrants [Member] |
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| Class of Warrant or Right, Exercised in Period (in shares) |
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122,368
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| Series I Warrants [Member] | Underwriting Agreement [Member] |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
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24,138
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| Class of Warrant or Right, Maximum Additional for Option (in shares) |
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24,634
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| Series I Warrants [Member] | Common Stock Units [Member] |
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| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
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1
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
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$ 19
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| Warrants and Rights Outstanding, Term (Month) |
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18 months
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| Series I Warrants [Member] | Pre-Funded Units [Member] |
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| Units Issued, Warrants Per Unit |
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1
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| Series J Warrants [Member] | Underwriting Agreement [Member] |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
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24,138
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| Class of Warrant or Right, Maximum Additional for Option (in shares) |
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24,634
|
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| Series J Warrants [Member] | Common Stock Units [Member] |
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| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
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1
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
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|
$ 19
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| Warrants and Rights Outstanding, Term (Month) |
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|
5 years
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| Series J Warrants [Member] | Pre-Funded Units [Member] |
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| Units Issued, Warrants Per Unit |
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1
|
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| September 2024 Representative Warrants [Member] |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
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11,302
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| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
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|
1
|
|
|
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
$ 29.45
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$ 29.45
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$ 29.45
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| Warrants and Rights Outstanding, Term (Month) |
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5 years
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| Class of Warrant or Right, Percentage of Outstanding Stock |
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6.00%
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| Maximum Beneficial Ownership |
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|
4.99%
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| Maximum Beneficial Ownership, With Notice |
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|
9.99%
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| Class of Warrant or Right, Exercisable Period (Month) |
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6 months
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| Class of Warrant or Right, Exercised in Period (in shares) |
|
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145,943
|
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| Series Warrants [Member] |
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| Maximum Beneficial Ownership |
|
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|
4.99%
|
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| Maximum Beneficial Ownership, With Notice |
|
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|
9.99%
|
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| Maximum Beneficial Ownership, Sixty One Days Notice |
|
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19.99%
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| Prefunded Warrants [Member] |
|
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| Maximum Beneficial Ownership, With Notice |
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9.99%
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| Existing Warrants [Member] |
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| Stock Issued During Period, Shares, Warrant Exercises (in shares) |
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|
281,470
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| Class of Warrant or Right, Exercised During Period, Exercise Price (in dollars per share) | $ / shares |
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|
$ 13.3
|
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| Proceeds from Warrant Exercises | $ |
|
|
$ 3,700
|
|
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| Payments of Costs Related to Exercise of Warrants | $ |
|
|
$ 400
|
|
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| Existing Warrants [Member] | Minimum [Member] |
|
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
|
$ 19
|
|
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| Existing Warrants [Member] | Maximum [Member] |
|
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|
|
|
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
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|
$ 760
|
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|
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| Series E Warrants [Member] |
|
|
|
|
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|
|
|
|
|
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| Class of Warrant or Right, Exercised in Period (in shares) |
|
|
1,745
|
|
|
|
|
|
|
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| Series F Warrants [Member] |
|
|
|
|
|
|
|
|
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| Class of Warrant or Right, Exercised in Period (in shares) |
|
|
26,311
|
|
|
|
|
|
|
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| Series G Warrants [Member] |
|
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|
|
|
|
|
|
|
|
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| Class of Warrant or Right, Exercised in Period (in shares) |
|
|
26,311
|
|
|
|
|
|
|
|
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| Series K Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
|
562,945
|
|
|
|
|
|
|
|
|
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
|
$ 13.3
|
|
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| Warrants and Rights Outstanding, Term (Month) |
|
|
5 years 6 months
|
|
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| The 2024 Placement Agent Warrants [Member] |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
|
16,888
|
|
|
|
|
|
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|
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
|
$ 20.62
|
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|
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| October 2024 Placement Warrants [Member] |
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| Class of Warrant or Right, Exercisable Period (Month) |
|
|
6 months
|
|
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| Series L Warrants [Member] |
|
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|
|
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
$ 9.5
|
|
|
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|
$ 9.5
|
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|
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| Series M Warrants [Member] |
|
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| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
1
|
|
|
|
|
1
|
|
|
|
|
|
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
$ 1.56
|
|
|
|
|
$ 1.56
|
|
|
|
|
|
| Warrants and Rights Outstanding, Term (Month) |
5 years 6 months
|
|
|
|
|
5 years 6 months
|
|
|
|
|
|
| Class of Warrant or Right, Issued in Period (in shares) |
340,000
|
|
|
|
|
|
|
|
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| Class of Warrant or Right, Callable Price of Warrants or Rights |
0.01
|
|
|
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|
0.01
|
|
|
|
|
|
| Class of Warrant or Right, Common Stock Share Price to Call Warrants |
1.5
|
|
|
|
|
1.5
|
|
|
|
|
|
| Warrants and Rights Outstanding | $ |
$ 509
|
|
|
|
|
$ 509
|
|
|
|
|
|
| September 2024 Public Offering [Member] |
|
|
|
|
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|
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| Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
42,415
|
|
|
|
|
|
|
|
| Proceeds from Issuance Initial Public Offering | $ |
|
|
|
$ 3,600
|
|
|
|
|
|
|
|
| Payments of Stock Issuance Costs | $ |
|
|
|
1,000
|
|
|
|
|
|
|
|
| Proceeds From Issuance or Sale of Equity, Net | $ |
|
|
|
$ 2,600
|
|
|
|
|
|
|
|
| Proceeds from Issuance of Common Stock | $ |
|
|
|
|
|
$ 0
|
$ 2,612
|
|
|
|
|
| September 2024 Public Offering [Member] | Common Stock Units [Member] |
|
|
|
|
|
|
|
|
|
|
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| Units Issued, Shares Per Unit |
|
|
|
1
|
|
|
|
|
|
|
|
| September 2024 Public Offering [Member] | Common Stock Units [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Class of Unit, Price per Unit (in dollars per share) | $ / shares |
|
|
|
$ 19
|
|
|
|
|
|
|
|
| September 2024 Public Offering [Member] | Pre-Funded Units [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Class of Unit, Price per Unit (in dollars per share) | $ / shares |
|
|
|
$ 18.9981
|
|
|
|
|
|
|
|
| Over-Allotment Option [Member] | Underwriting Agreement [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
|
24,138
|
|
|
|
|
|
|
| Option, Period (Day) |
|
|
|
45 days
|
|
|
|
|
|
|
|
| Option, Maximum Additional Shares (in shares) |
|
|
|
24,634
|
|
|
|
|
|
|
|
| Over-Allotment Option [Member] | Common Stock Units [Member] | Underwriting Agreement [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
|
42,415
|
|
|
|
|
|
|
| May 2025 PIPE Financing [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Payments of Stock Issuance Costs | $ |
|
$ 400
|
|
|
|
|
|
|
|
|
|
| Maximum Beneficial Ownership |
|
4.99%
|
|
|
|
|
|
|
|
|
|
| Maximum Beneficial Ownership, With Notice |
|
9.99%
|
|
|
|
|
|
|
|
|
|
| Proceeds from Issuance or Sale of Equity | $ |
|
$ 1,500
|
|
|
|
|
|
|
|
|
|
| Warrant, Exercisable Minimum Share Price (in dollars per share) | $ / shares |
|
$ 28.5
|
|
|
|
|
|
|
|
|
|
| Failure to Register Penalty, Percentage of Subscription Amount Every Thirty Days |
|
2.00%
|
|
|
|
|
|
|
|
|
|
| Failure to Register Penalty, Interest on Unpaid Amount |
|
18.00%
|
|
|
|
|
|
|
|
|
|
| May 2025 PIPE Financing [Member] | QHS Lab Note [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument, Fair Value Disclosure | $ |
|
$ 864
|
|
|
|
|
|
|
|
|
|
| May 2025 PIPE Financing [Member] | PIPE Units [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Stock Issued During Period, Shares, New Issues (in shares) |
|
1,500
|
|
|
|
|
|
|
|
|
|
| May 2025 PIPE Financing [Member] | Series B Convertible Preferred Stock [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Stock Issued During Period, Shares, New Issues (in shares) |
|
1,500
|
|
|
|
|
|
|
|
|
|
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
150
|
|
|
|
|
|
|
|
|
|
| Units Issued, Shares Per Unit |
|
1
|
|
|
|
|
|
|
|
|
|
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
$ 9.5
|
|
|
|
|
|
|
|
|
|
| Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
|
$ 0.0001
|
|
|
|
|
|
|
|
|
|
| May 2025 PIPE Financing [Member] | Series L Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
150
|
|
|
|
|
|
|
|
|
|
| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
|
1
|
|
|
|
|
|
|
|
|
|
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
$ 9.5
|
|
|
|
|
|
|
|
|
|
| Warrants and Rights Outstanding, Term (Month) |
|
5 years 6 months
|
|
|
|
|
|
|
|
|
|
| Class of Warrant or Right, Callable, Price Per Share (in dollars per share) | $ / shares |
|
$ 0.19
|
|
|
|
|
|
|
|
|
|
| May 2025 PIPE Financing [Member] | Placement Agent Warrants [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
|
13,534
|
|
|
|
|
|
|
|
|
|
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
|
$ 10.3075
|
|
|
|
|
|
|
|
|
|
| Warrants and Rights Outstanding, Term (Month) |
|
5 years
|
|
|
|
|
|
|
|
|
|
| ATM Offering [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Stock Issued During Period, Shares, New Issues (in shares) |
|
|
|
|
|
887,852
|
|
|
|
|
|
| Payments of Stock Issuance Costs | $ |
|
|
|
|
|
$ 300
|
|
|
|
|
|
| Equity, Issuable, Maximum Issuance Value | $ |
|
|
|
|
|
|
|
|
$ 4,300
|
$ 3,200
|
$ 1,300
|
| Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
|
|
|
$ 0.0001
|
| Commission Fee, Percent of Gross Proceeds |
|
|
|
|
|
|
|
|
|
3.00%
|
|
| Proceeds from Issuance of Common Stock | $ |
|
|
|
|
|
3,751
|
0
|
|
|
|
|
| The 2022 Offering [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Accrued Liabilities, Current | $ |
$ 1,400
|
|
|
|
|
$ 1,400
|
$ 1,400
|
|
|
|
|