Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Allowance for credit losses	$ 111	$ 111
Accumulated depreciation	18,763	18,703
Accumulated amortization	$ 483	$ 468
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	31,361,303	31,361,303
Common stock, shares outstanding (in shares)	30,385,297	30,825,297