Note 9 - Stock-Based Compensation - Restricted Stock Awards (Details) - Restricted Stock [Member] $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($) $ / shares shares
Balance, number of shares (in shares) | shares	20,118
Balance, weighted average grant date fair value (in dollars per share) | $ / shares	$ 5,220
Balance, aggregate grant date fair value | $	$ 105
Granted, number of shares (in shares) | shares	0
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0
Vested, number of shares (in shares) | shares	0
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0
Canceled, number of shares (in shares) | shares	0
Canceled, weighted average grant date fair value (in dollars per share) | $ / shares	$ 0
Balance, number of shares (in shares) | shares	20,118
Balance, weighted average grant date fair value (in dollars per share) | $ / shares	$ 5,220