Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2018		$ 9	$ 93,100	$ 146,191	$ 1	$ (2,290)
Beginning Balance (shares) at Dec. 31, 2018		8,752,490				292,855
Share-based compensation			432
Share-based compensation (shares)		6,401
Net gain (loss) on derivative instruments					(67)
Adoption of ASU 2018-02	$ (21)			21	(21)
Net (loss) income	1,222			1,222
Ending Balance at Mar. 31, 2019		$ 9	93,701	147,434	(87)	$ (2,290)
Ending Balance (shares) at Mar. 31, 2019		8,772,211				292,855
Common stock issuance under Employee Stock Purchase Plan			128
Common stock issuance under Employee Stock Purchase Plan (shares)		9,270
Exercise of stock options			41
Exercise of stock options (shares)		4,050
Beginning Balance at Dec. 31, 2019	243,136	$ 9	94,982	150,487	(31)	$ (2,311)
Beginning Balance (shares) at Dec. 31, 2019		8,799,436				294,279
Share-based compensation			511
Share-based compensation (shares)		3,680
Net gain (loss) on derivative instruments					120
Net (loss) income	(1,411)			(1,411)
Ending Balance at Mar. 31, 2020	$ 242,356	$ 9	$ 95,493	$ 149,076	$ 89	$ (2,311)
Ending Balance (shares) at Mar. 31, 2020		8,803,116				294,279