CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive income (loss)	Treasury stock
Beginning Balance (in shares) at Dec. 31, 2019		3,663
Beginning Balance at Dec. 31, 2019	$ 36,034	$ 4	$ 486,088	$ (436,507)	$ (479)	$ (13,072)
Beginning Balance, treasury stock (in shares) at Dec. 31, 2019						(726)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,243)			(1,243)
Other comprehensive income (loss), translation adjustments	1,005				1,005
Purchase of treasury stock (in shares)						(260)
Purchases of treasury stock	(2,239)					$ (2,239)
Purchase of restricted stock from employees (in shares)						(1)
Purchase of restricted stock from employees	(14)					$ (14)
Stock-based compensation and vesting of restricted stock units (in shares)		9
Stock-based compensation and vesting of restricted stock units	$ 737		737
Ending Balance, treasury stock (in shares) at Dec. 31, 2020	987					(987)
Ending Balance (in shares) at Dec. 31, 2020	2,685	3,672
Ending Balance at Dec. 31, 2020	$ 34,280	$ 4	486,825	(437,750)	526	$ (15,325)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	3,227			3,227
Other comprehensive income (loss), translation adjustments	(611)				(611)
Purchases of treasury stock	0
Purchase of restricted stock from employees (in shares)		0
Purchase of restricted stock from employees	(4)					$ (4)
Stock-based compensation and vesting of restricted stock units (in shares)		22
Stock-based compensation and vesting of restricted stock units	$ 2,424		2,424
Ending Balance, treasury stock (in shares) at Dec. 31, 2021	987					(987)
Ending Balance (in shares) at Dec. 31, 2021	2,707	3,694
Ending Balance at Dec. 31, 2021	$ 39,316	$ 4	$ 489,249	$ (434,523)	$ (85)	$ (15,329)