CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets:
Fixed assets, accumulated depreciation	$ 20,282	$ 19,979
Intangible assets, accumulated amortization	$ 4,107	$ 4,005
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)	13,035,321	12,976,227
Common stock, shares outstanding (in shares)	8,990,479	8,931,385
Treasury stock (in shares)	4,044,842	4,044,842