CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets:
Fixed assets, accumulated depreciation	$ 17,869	$ 17,656
Intangible assets, accumulated amortization	$ 1,402	$ 1,364
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	13,998,535	13,956,725
Common stock, shares outstanding (in shares)	9,953,693	9,911,883
Treasury stock (in shares)	4,044,842	4,044,842