Note 11 - Stock-Based Compensation- Restricted Stock Activity (Details) - Restricted Stock [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Unvested, balance (in shares)	419	256
Unvested, weighted average grant date fair value (in dollars per share)	$ 7.86	$ 20.88
Granted, balance (in shares)	3,380	695
Granted, weighted average grant date fair value (in dollars per share)	$ 0.97	$ 3.77
Vested, balance (in shares)	(2,154)	(515)
Vested, weighted average grant date fair value (in dollars per share)	$ 1.96	$ 8.81
Canceled and forfeited, balance (in shares)	(153)	(17)
Canceled and forfeited, weighted average grant date fair value (in dollars per share)	$ 1.02	$ 7.75
Unvested, balance (in shares)	1,492	419
Unvested, weighted average grant date fair value (in dollars per share)	$ 1.47	$ 7.86