Condensed Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Cumulative effect of adoption of ASC 842	Cumulative effect of adoption of ASC 842 Retained Earnings
Beginning balance (in shares) at Dec. 31, 2018		2,862,760
Beginning balance at Dec. 31, 2018	$ (207,156)	$ 29	$ 42,245	$ 26,558	$ 0	$ (275,988)	$ (77)	$ (77)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)		21,383
Common shares issued under share-based compensation plans, net of shares withheld for employee taxes	0
Shares withheld for taxes upon vesting of restricted stock	(195)					(195)
Amortization of preferred stock issuance costs	(51)			(51)
Share-based compensation	698		698
Currency translation adjustments, net	12				12
Net (loss) income	(840)			(840)
Ending balance (in shares) at Mar. 31, 2019		2,884,143
Ending balance at Mar. 31, 2019	(207,609)	$ 29	42,943	25,590	12	(276,183)
Beginning balance (in shares) at Dec. 31, 2018		2,862,760
Beginning balance at Dec. 31, 2018	(207,156)	$ 29	42,245	26,558	0	(275,988)	$ (77)	$ (77)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of preferred stock issuance costs	(103)
Currency translation adjustments, net	17
Net (loss) income	2,449
Ending balance (in shares) at Jun. 30, 2019		2,886,009
Ending balance at Jun. 30, 2019	(203,785)	$ 29	43,531	28,827	17	(276,189)
Beginning balance (in shares) at Mar. 31, 2019		2,884,143
Beginning balance at Mar. 31, 2019	(207,609)	$ 29	42,943	25,590	12	(276,183)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)		1,866
Common shares issued under share-based compensation plans, net of shares withheld for employee taxes	0
Shares withheld for taxes upon vesting of restricted stock	(6)					(6)
Amortization of preferred stock issuance costs	(52)			(52)
Share-based compensation	588		588
Currency translation adjustments, net	5				5
Net (loss) income	3,289			3,289
Ending balance (in shares) at Jun. 30, 2019		2,886,009
Ending balance at Jun. 30, 2019	$ (203,785)	$ 29	43,531	28,827	17	(276,189)
Beginning balance (in shares) at Dec. 31, 2019	1,598,512	2,897,177
Beginning balance at Dec. 31, 2019	$ (207,928)	$ 29	44,646	23,662	(33)	(276,232)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)		39,562
Common shares issued under share-based compensation plans, net of shares withheld for employee taxes	4		4
Shares withheld for taxes upon vesting of restricted stock	(196)					(196)
Amortization of preferred stock issuance costs	(42)			(42)
Share-based compensation	477		477
Currency translation adjustments, net	(89)				(89)
Net (loss) income	(3,757)			(3,757)
Ending balance (in shares) at Mar. 31, 2020		2,936,739
Ending balance at Mar. 31, 2020	$ (211,531)	$ 29	45,127	19,863	(122)	(276,428)
Beginning balance (in shares) at Dec. 31, 2019	1,598,512	2,897,177
Beginning balance at Dec. 31, 2019	$ (207,928)	$ 29	44,646	23,662	(33)	(276,232)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amortization of preferred stock issuance costs	(42)
Currency translation adjustments, net	(93)
Net (loss) income	$ (11,592)
Ending balance (in shares) at Jun. 30, 2020	1,632,117	2,942,597
Ending balance at Jun. 30, 2020	$ (218,967)	$ 29	45,530	12,028	(126)	(276,428)
Beginning balance (in shares) at Mar. 31, 2020		2,936,739
Beginning balance at Mar. 31, 2020	(211,531)	$ 29	45,127	19,863	(122)	(276,428)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares issued under share-based compensation plans, net of shares withheld for employee taxes (in shares)		5,858
Common shares issued under share-based compensation plans, net of shares withheld for employee taxes	10		10
Amortization of preferred stock issuance costs	0
Share-based compensation	393		393
Currency translation adjustments, net	(4)				(4)
Net (loss) income	$ (7,835)			(7,835)
Ending balance (in shares) at Jun. 30, 2020	1,632,117	2,942,597
Ending balance at Jun. 30, 2020	$ (218,967)	$ 29	$ 45,530	$ 12,028	$ (126)	$ (276,428)