Note 2 - Summary of Significant Accounting Policies and Recently Issued Accounting Pronouncements (Details Textual) $ / shares in Units, $ in Thousands |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
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Jun. 30, 2026
USD ($)
$ / shares
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Jun. 30, 2025 |
Jun. 30, 2026
USD ($)
$ / shares
|
Jun. 30, 2025 |
Dec. 31, 2025
USD ($)
$ / shares
|
Jul. 31, 2024
USD ($)
|
|
| Number of Operating Segments | 2 | |||||
| Accounts Receivable, Allowance for Credit Loss | $ 0 | $ 0 | $ 0 | |||
| Prepaid Expense, Noncurrent | $ 751 | $ 751 | $ 647 | $ 1,200 | ||
| Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares | $ 0.01 | $ 0.01 | $ 0.01 | |||
| Customer Concentration Risk [Member] | Health Regen [Member] | Revenue Benchmark [Member] | ||||||
| Concentration Risk, Percentage | 100.00% | 90.00% | 100.00% | 90.00% | ||
| Clinical Activity Trials [Member] | ||||||
| Prepaid Expense, Noncurrent | $ 700 | $ 700 | ||||
| Payments of Long-term Prepaid Contracts | 200 | |||||
| Other Deposits [Member] | ||||||
| Prepaid Expense, Noncurrent | $ 100 | $ 100 | ||||
| X | ||||||||||
- Definition The amount of cash outflow from payments of long-term prepaid contracts. No definition available.
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- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Face amount or stated value per share of common stock. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of amounts paid in advance for expenses which will be charged against earnings in periods after one year or beyond the operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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