CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common stock and Paid-in Capital	Common Stock	Unamortized Cost of Equity Awards	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balances at Dec. 31, 2017	$ 31,051	$ 34,473	$ (3,422)	$ 61,882	$ (5,586)	$ 87,347
Balances (in shares) at Dec. 31, 2017		9,427
Increase (Decrease) in Stockholders' Equity
Stock transactions under employee benefit stock plans	849	$ 849				849
Stock transactions under employee benefit stock plans (in shares)		26
Issuance of restricted stock, net of forfeitures		$ 1,582	(1,582)
Issuance of restricted stock, net of forfeitures (in shares)		30
Stock compensation expense	460		460			460
Shares withheld for payment of employee payroll taxes	(34)	$ (34)				(34)
Shares withheld for payment of employee payroll taxes (in shares)		(1)
Foreign currency translation adjustments					1,687	1,687
Accumulated income (loss) on derivatives					604	604
Net income				4,198		4,198
Balances at Mar. 31, 2018	32,326	$ 36,870	(4,544)	66,080	(3,295)	95,111
Balances (in shares) at Mar. 31, 2018		9,482
Balances at Dec. 31, 2018	33,613	$ 36,779	(3,166)	76,718	(8,518)	$ 101,813
Balances (in shares) at Dec. 31, 2018		9,485				9,607
Increase (Decrease) in Stockholders' Equity
Stock transactions under employee benefit stock plans	1,088	$ 1,088				$ 1,088
Stock transactions under employee benefit stock plans (in shares)		27
Issuance of restricted stock, net of forfeitures	330	$ 4,059	(3,729)			330
Issuance of restricted stock, net of forfeitures (in shares)		96
Stock compensation expense	596		596			596
Shares withheld for payment of employee payroll taxes	(63)	$ (63)				(63)
Shares withheld for payment of employee payroll taxes (in shares)		(1)
Foreign currency translation adjustments					(887)	(887)
Accumulated income (loss) on derivatives					(343)	(343)
Tax effect of derivative transactions					81	81
Net income				4,470		4,470
Dividends to stockholders				(287)		(287)
Balances at Mar. 31, 2019	$ 35,564	$ 41,863	$ (6,299)	$ 80,901	$ (9,667)	$ 106,798
Balances (in shares) at Mar. 31, 2019		9,607				9,607