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, 2018	$ 33,613	$ 36,779	$ (3,166)	$ 76,718	$ (8,518)	$ 101,813
Balances (in shares) at Dec. 31, 2018		9,485
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 adjustment					(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
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
Increase (Decrease) in Stockholders' Equity
Foreign currency translation adjustment						(2,708)
Net income						13,533
Balances at Sep. 30, 2019	36,437	$ 41,632	(5,195)	89,388	(12,029)	113,796
Balances (in shares) at Sep. 30, 2019		9,600
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
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock, net of forfeitures		$ 416	(416)
Issuance of restricted stock, net of forfeitures (in shares)		11
Stock compensation expense	780		780			780
Shares withheld for payment of employee payroll taxes	(647)	$ (647)				(647)
Shares withheld for payment of employee payroll taxes (in shares)		(18)
Foreign currency translation adjustment					548	548
Accumulated income (loss) on derivatives					(564)	(564)
Tax effect of derivative transactions					128	128
Net income				4,445		4,445
Dividends to stockholders				(288)		(288)
Balances at Jun. 30, 2019	35,697	$ 41,632	(5,935)	85,058	(9,555)	111,200
Balances (in shares) at Jun. 30, 2019		9,600
Increase (Decrease) in Stockholders' Equity
Stock compensation expense	740		740			740
Foreign currency translation adjustment					(2,369)	(2,369)
Accumulated income (loss) on derivatives					(135)	(135)
Tax effect of derivative transactions					30	30
Net income				4,618		4,618
Dividends to stockholders				(288)		(288)
Balances at Sep. 30, 2019	36,437	$ 41,632	(5,195)	89,388	(12,029)	113,796
Balances (in shares) at Sep. 30, 2019		9,600
Balances at Dec. 31, 2019	37,136	$ 41,642	(4,506)	92,589	(10,531)	$ 119,194
Balances (in shares) at Dec. 31, 2019		9,599				9,599
Increase (Decrease) in Stockholders' Equity
Stock transactions under employee benefit stock plans	1,252	$ 1,252				$ 1,252
Stock transactions under employee benefit stock plans (in shares)		32
Issuance of restricted stock, net of forfeitures	485	$ 3,574	(3,089)			485
Issuance of restricted stock, net of forfeitures (in shares)		104
Stock compensation expense	789		789			789
Shares withheld for payment of employee payroll taxes	(256)	$ (256)				(256)
Shares withheld for payment of employee payroll taxes (in shares)		(24)
Foreign currency translation adjustment					(2,428)	(2,428)
Accumulated income (loss) on derivatives					(1,432)	(1,432)
Tax effect of derivative transactions					344	344
Net income				4,035		4,035
Dividends to stockholders				(290)		(290)
Balances at Mar. 31, 2020	39,406	$ 46,212	(6,806)	96,334	(14,047)	121,693
Balances (in shares) at Mar. 31, 2020		9,711
Balances at Dec. 31, 2019	37,136	$ 41,642	(4,506)	92,589	(10,531)	$ 119,194
Balances (in shares) at Dec. 31, 2019		9,599				9,599
Increase (Decrease) in Stockholders' Equity
Foreign currency translation adjustment						$ 2,937
Net income						10,944
Balances at Sep. 30, 2020	40,674	$ 47,431	(6,757)	102,659	(8,941)	$ 134,392
Balances (in shares) at Sep. 30, 2020		9,757				9,757
Balances at Mar. 31, 2020	39,406	$ 46,212	(6,806)	96,334	(14,047)	$ 121,693
Balances (in shares) at Mar. 31, 2020		9,711
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock, net of forfeitures		$ 1,222	(1,222)
Issuance of restricted stock, net of forfeitures (in shares)		38
Stock compensation expense	921		921			921
Shares withheld for payment of employee payroll taxes	(541)	$ (541)				(541)
Shares withheld for payment of employee payroll taxes (in shares)		(5)
Foreign currency translation adjustment					1,932	1,932
Accumulated income (loss) on derivatives					(433)	(433)
Tax effect of derivative transactions					104	104
Net income				2,896		2,896
Dividends to stockholders				(292)		(292)
Balances at Jun. 30, 2020	39,786	$ 46,893	(7,107)	98,938	(12,444)	126,280
Balances (in shares) at Jun. 30, 2020		9,744
Increase (Decrease) in Stockholders' Equity
Issuance of restricted stock, net of forfeitures		$ 555	(555)
Issuance of restricted stock, net of forfeitures (in shares)		14
Stock compensation expense	905		905			905
Shares withheld for payment of employee payroll taxes	(17)	$ (17)				(17)
Shares withheld for payment of employee payroll taxes (in shares)		(1)
Foreign currency translation adjustment					3,433	3,433
Accumulated income (loss) on derivatives					91	91
Tax effect of derivative transactions					(21)	(21)
Net income				4,013		4,013
Dividends to stockholders				(292)		(292)
Balances at Sep. 30, 2020	$ 40,674	$ 47,431	$ (6,757)	$ 102,659	$ (8,941)	$ 134,392
Balances (in shares) at Sep. 30, 2020		9,757				9,757