Note 2 - Basis of Presentation, Principles of Consolidation and Significant Accounting Policies and Liquidity - Schedule of Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Warrant Liability Long Term [Member] | |||
| Balance | $ 33 | $ 44 | |
| Change in fair value - net | 7 | (10,763) | |
| Balance | 40 | 40 | |
| Warrants issued | 23,435 | ||
| Warrants exercised | (1) | ||
| Warrants reclassification | (12,675) | ||
| Fair Value, Recurring [Member] | Warrant Liability [Member] | |||
| Fair value of warrant liability | 40 | 40 | $ 44 |
| Fair Value, Recurring [Member] | Warrant Liability [Member] | Fair Value, Inputs, Level 1 [Member] | |||
| Fair value of warrant liability | 0 | 0 | 0 |
| Fair Value, Recurring [Member] | Warrant Liability [Member] | Fair Value, Inputs, Level 2 [Member] | |||
| Fair value of warrant liability | 0 | 0 | 0 |
| Fair Value, Recurring [Member] | Warrant Liability [Member] | Fair Value, Inputs, Level 3 [Member] | |||
| Fair value of warrant liability | $ 40 | $ 40 | $ 44 |