Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total		Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at Dec. 31, 2018	$ 25	$ 4,267	$ (9,038)	$ 64,476	$ (1,444)	$ 58,286
Balance (Accounting Standards Update 2016-02 [Member]) at Dec. 31, 2018								$ 0	$ 0	$ 0	$ (362)	$ 0	$ (362)
Balance (in shares) at Dec. 31, 2018						9,060,561
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	0	770	0	0	0	$ 770
Issuance of restricted stock	$ 0	0	0	0	0	0
Issuance of restricted stock (in shares)	93,408
Purchase of treasury stock	$ 0	0	$ (735)	0	0	$ (735)
Purchase of treasury stock (in shares)			(131,782)			(131,782)
Net loss	0	0	$ 0	(1,903)	0	$ (1,903)	[1]
Foreign currency translation adjustments, net of tax	0	0	0	0	363	363
Balance at Dec. 31, 2019	25	5,037	(9,773)	62,211	(1,081)	$ 56,419
Balance (in shares) at Dec. 31, 2019						9,022,187
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	0	887	0	0	0	$ 887
Issuance of restricted stock	$ 0	0	0	0	0	$ 0
Issuance of restricted stock (in shares)	128,619
Purchase of treasury stock (in shares)						0
Net loss	$ 0	0	0	(4,901)	0	$ (4,901)	[1]
Foreign currency translation adjustments, net of tax	0	0	0	0	(211)	(211)
Balance at Dec. 31, 2020	$ 25	$ 5,924	$ (9,773)	$ 57,310	$ (1,292)	$ 52,194
Balance (in shares) at Dec. 31, 2020						9,150,806

[1] For the years ended December 31, 2020 and 2019, there were 6,401 and 9,203 shares, respectively, excluded from the diluted EPS calculation because the impact of their assumed vesting would be anti-dilutive due to a net loss in that period.