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, 2013		33,332
Beginning Balance at Dec. 31, 2013	$ 74,385	$ 34	$ 475,461	$ (417,422)	$ 17,173	$ (861)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(13,194)			(13,194)
Other comprehensive income (loss), translation adjustments	(3,718)				(3,718)
Other comprehensive income (loss), pension liability adjustment	158				158
Payments for Repurchase of Common Stock	0
Purchase of restricted stock from employees		(36)
Purchase of restricted stock from employees	$ (129)					(129)
Issuance of shares for 401(k) plan contribution (in shares)	118	118
Issuance of shares for 401(k) plan contribution	$ 430		(97)			527
Stock-based compensation (in shares)		128
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	1,325		1,325
Ending Balance (in shares) at Dec. 31, 2014		33,542
Ending Balance at Dec. 31, 2014	59,257	$ 34	476,689	(430,616)	13,613	(463)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,329			2,329
Other comprehensive income (loss), translation adjustments	(3,326)				(3,326)
Other comprehensive income (loss), pension liability adjustment	5				5
Stock Repurchased During Period, Shares		(528)
Payments for Repurchase of Common Stock	(1,386)					(1,386)
Purchase of restricted stock from employees		(108)
Purchase of restricted stock from employees	$ (244)					(244)
Issuance of shares for 401(k) plan contribution (in shares)	116	116
Issuance of shares for 401(k) plan contribution	$ 314		(104)			418
Stock-based compensation (in shares)		1,589
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	4,231		4,231
Ending Balance (in shares) at Dec. 31, 2015		34,611
Ending Balance at Dec. 31, 2015	61,180	$ 34	480,816	(428,287)	10,292	(1,675)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(8,790)			(8,790)
Other comprehensive income (loss), translation adjustments	(3,333)				(3,333)
Other comprehensive income (loss), pension liability adjustment	(28)				(28)
Dividends, Common Stock, Cash	(3,401)			(3,401)
Stock Repurchased During Period, Shares		(2,461)
Payments for Repurchase of Common Stock	(5,127)					(5,127)
Purchase of restricted stock from employees		(35)
Purchase of restricted stock from employees	$ (65)					(65)
Issuance of shares for 401(k) plan contribution (in shares)	0
Stock-based compensation (in shares)		(350)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	$ 1,449		1,449
Ending Balance (in shares) at Dec. 31, 2016		31,765
Ending Balance at Dec. 31, 2016	$ 41,885	$ 34	$ 482,265	$ (440,478)	$ 6,931	$ (6,867)