Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net income (loss)	$ 9,282	$ (7,253)
Other comprehensive income (loss):
Decrease (increase) in additional minimum pension liability	518	(97)
Foreign currency translation adjustment	75	(151)
Comprehensive income (loss)	$ 9,875	$ (7,501)