CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Other Cumulative Comprehensive Loss	Treasury Stock
Beginning balances (in shares) at Dec. 31, 2014		13,997,076				0
Beginning balances at Dec. 31, 2014	$ 154,915	$ 700	$ 67,088	$ 113,723	$ (26,596)	$ 0
Increase (Decrease) in Stockholders' Equity
Net loss	(23,971)			(23,971)
Change in cumulative foreign currency translation adjustment	(13,869)				(13,869)
Shares issued in connection with stock compensation plans (in shares)		215,039
Shares issued in connection with stock compensation plans	272	$ 11	261
Tax impact of stock-based compensation	(303)		(303)
Stock-based compensation	3,362		3,362
Dividends declared	(1,985)			(1,985)
Ending balances (in shares) at Dec. 31, 2015		14,212,115				0
Ending balances at Dec. 31, 2015	118,421	$ 711	70,408	87,767	(40,465)	$ 0
Increase (Decrease) in Stockholders' Equity
Net loss	(6,505)			(6,505)
Change in cumulative foreign currency translation adjustment	(1,049)				(1,049)
Shares issued in connection with stock compensation plans (in shares)		286,622
Shares issued in connection with stock compensation plans	322	$ 14	308
Stock-based compensation	2,400		2,400
Dividends declared	(1,155)			(1,155)
Treasury stock purchases (in shares)						(2,378)
Treasury stock purchases	(25)					$ (25)
Ending balances (in shares) at Dec. 31, 2016		14,498,737				2,378
Ending balances at Dec. 31, 2016	112,409	$ 725	73,116	80,107	(41,514)	$ (25)
Increase (Decrease) in Stockholders' Equity
Net loss	(18,853)			(18,853)
Change in cumulative foreign currency translation adjustment	10,695				10,695
Shares issued in connection with stock compensation plans (in shares)		323,064
Shares issued in connection with stock compensation plans	296	$ 16	280
Stock-based compensation	2,750		2,750
Dividends declared	(1,180)			(1,180)
Treasury stock purchases (in shares)						(37,405)
Treasury stock purchases	(337)					$ (337)
Ending balances (in shares) at Dec. 31, 2017		14,821,801				39,783
Ending balances at Dec. 31, 2017	$ 105,780	$ 741	$ 76,146	$ 60,074	$ (30,819)	$ (362)