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Period Type:

Note 7 - Debt (Details Textual)						1 Months Ended	2 Months Ended	12 Months Ended
Note 7 - Debt (Details Textual)	Jul. 29, 2026 USD ($)	Jun. 01, 2026 USD ($)	Jun. 11, 2025 USD ($)	Jun. 06, 2025 USD ($)	Jun. 05, 2025 USD ($) $ / shares shares	May 31, 2021 USD ($) $ / shares	Aug. 27, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 06, 2026 USD ($)	May 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
Debt Instrument, Payment-in-kind, Rate, Applicable Margin				0.3333
Stock Issued During Period, Value, New Issues								$ 665,000	$ 1,627,000
Repayments of Debt		$ 18,000,000
Gain (Loss) on Extinguishment of Debt								0	1,475,000
Convertible Note Exchange [Member]
Debt Conversion, Original Debt, Amount					$ 82,000,000
Debt Instrument, Exchanged Value						$ 82,000,000
Debt Conversion, Converted Instrument, Shares Issued (in shares) \| shares					8,881,579
Debt Instrument, Convertible, Conversion Price (in dollars per share) \| $ / shares					$ 1.52
Debt Conversion, Converted Instrument, Amount			$ 11,100,000		$ 13,500,000
Repayments of Debt					68,500,000
Gain (Loss) on Extinguishment of Debt			$ 2,400,000
Subsequent Event [Member] \| Conversion of Financing Agreement Debt into Series A Convertible Preferred Stock [Member]
Debt Conversion, Original Debt, Amount	$ 40,000,000						$ 40,000,000
Subsequent Event [Member] \| Securities Purchase Agreement [Member]
Stock Issued During Period, Value, New Issues	55,000,000
Proceeds from Issuance of Preferred Stock and Preference Stock	$ 15,000,000
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity								$ 20,000,000
TCW Asset Management Company LLC [Member] \| Accuray Inc [Member] \| Minimum [Member]
Ownership Percentage				5.00%
Facilities [Member]
Debt Instrument, Term (Year)				5 years
Debt Instrument, Fee Amount										$ 13,100,000
Debt Instrument, Original Issuance Discount Fee										$ 5,400,000
Debt Instrument, Payment-in-kind, Rate, Maximum				0.06
Debt Instrument, Payment-in-kind, Interest Rate				0.01
Debt Instrument, Payment-in-kind Rate, Interest Rate				0.01
Facilities [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Floor Rate				0.02
Debt Instrument, Basis Spread on Variable Rate				8.50%
Facilities [Member] \| Reference Rate [Member]
Debt Instrument, Floor Rate				0.03
Debt Instrument, Basis Spread on Variable Rate				7.50%
Facilities [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 20,000,000								$ 15,000,000
Debt Instrument, Fee Amount									1,200,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.50%
Facilities [Member] \| Term Loan Facility [Member]
Debt Instrument, Face Amount				$ 150,000,000
Facilities [Member] \| Delayed Draw Facility [Member]
Debt Instrument, Face Amount				$ 20,000,000
Debt Instrument, Fee Amount									$ 1,200,000
Facilities [Member] \| Delayed Draw Term Loan (DDTL) [Member]
Debt Instrument, Face Amount												18,300,000
Debt Instrument, Fee Amount												$ 2,400,000
Delayed Draw Facility [Member]
Debt Instrument, Face Amount											$ 18,300,000
Debt Instrument, Fee Amount											$ 300,000
Convertible Senior Notes Due June 1, 2026 [Member]
Debt Instrument, Face Amount					18,000,000	$ 100,000,000
Debt Instrument, Interest Rate, Stated Percentage						3.75%
Debt Instrument, Convertible, Conversion Price (in dollars per share) \| $ / shares						$ 5.86
Repayments of Debt		$ 18,000,000
Gain (Loss) on Extinguishment of Debt					$ 500,000
Debt Instrument, Convertible, Conversion Ratio						1.705611
Debt Instrument, Principal Amount Denomination for Conversion into Common Stock						$ 1,000
Debt Instrument, Repurchase Price, Fundamental Change						1