CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Unamortized Cost of Equity Awards	Retained Earnings	Foreign Currency Translation Adjustments	Accumulated income (loss) on derivatives	Pension Adjustments	Total
Balances at Dec. 31, 2015	$ 31,437	$ (3,613)	$ 46,650	$ (9,162)	$ (27)	$ (688)	$ 64,597
Balances (in shares) at Dec. 31, 2015	9,276,000
Increase (Decrease) in Stockholders' Equity
Stock transactions under employee benefit stock plans	$ 839						839
Stock transactions under employee benefit stock plans (in shares)	49,000
Issuance of restricted stock, net of forfeitures	$ 1,969	(1,968)					1
Issuance of restricted stock, net of forfeitures (in shares)	101,000
Stock compensation expense		1,893					1,893
Shares withheld for payment of employee payroll taxes	$ (1,054)						(1,054)
Shares withheld for payment of employee payroll taxes (in shares)	(52,000)
Comprehensive income (loss)				(1,989)	(3)	(212)	(2,204)
Tax effect						78	78
Net income			9,078				9,078
Dividends to stockholders			(942)				(942)
Balances at Dec. 31, 2016	$ 33,191	(3,688)	54,786	(11,151)	(30)	(822)	72,286
Balances (in shares) at Dec. 31, 2016	9,374,000
Increase (Decrease) in Stockholders' Equity
Stock transactions under employee benefit stock plans	$ 657						657
Stock transactions under employee benefit stock plans (in shares)	28,000
Issuance of restricted stock, net of forfeitures	$ 2,138	(1,599)					539
Issuance of restricted stock, net of forfeitures (in shares)	88,000
Stock compensation expense		1,865					1,865
Shares withheld for payment of employee payroll taxes	$ (1,513)						(1,513)
Shares withheld for payment of employee payroll taxes (in shares)	(63,000)
Comprehensive income (loss)				6,314	226	(102)	6,438
Tax effect						(21)	(21)
Net income			8,036				8,036
Dividends to stockholders			(940)				(940)
Balances at Dec. 31, 2017	$ 34,473	(3,422)	61,882	(4,837)	196	(945)	$ 87,347
Balances (in shares) at Dec. 31, 2017	9,427,000						9,427
Increase (Decrease) in Stockholders' Equity
Stock transactions under employee benefit stock plans	$ 852						$ 852
Stock transactions under employee benefit stock plans (in shares)	26,000
Issuance of restricted stock, net of forfeitures	$ 3,033	(1,859)					1,174
Issuance of restricted stock, net of forfeitures (in shares)	92,000
Stock compensation expense		2,115					2,115
Shares withheld for payment of employee payroll taxes	$ (1,579)						(1,579)
Shares withheld for payment of employee payroll taxes (in shares)	(60,000)
Comprehensive income (loss)				(3,109)	370	(63)	(2,802)
Tax effect					(132)	2	(130)
Net income			15,925				15,925
Dividends to stockholders			(1,089)				(1,089)
Balances at Dec. 31, 2018	$ 36,779	$ (3,166)	$ 76,718	$ (7,946)	$ 434	$ (1,006)	$ 101,813
Balances (in shares) at Dec. 31, 2018	9,485,000						9,485