Note 1 - Summary of Significant Accounting Policies - RSU Activity (Details) - Restricted Stock Units (RSUs) [Member] $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares
Outstanding, shares (in shares) | shares	21,000
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 12.00
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period | shares	18,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares	$ 9.37
Vested, shares (in shares) | shares	(10,500)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 12.00
Forfeited, shares (in shares) | shares	(6,000)
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 10.93
Outstanding, shares (in shares) | shares	22,500
Outstanding, weighted average grant date fair value (in dollars per share) | $ / shares	$ 10.18
Outstanding, weighted average remaining contractual term (Year)	9 years 5 months 23 days
Outstanding, aggregate fair value | $	$ 73