Consolidated Statements of Stockholders' Equity (Deficit) Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance (in shares) at Dec. 31, 2017		3,734	0
Beginning Balance at Dec. 31, 2017	$ 33,985	$ 37	$ 0	$ 49,944	$ (13,327)	$ (2,669)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(13,654)				(13,654)
Foreign currency translation adjustments, net of tax	(1,999)					(1,999)
Change in unrecognized pension and postretirement benefit costs, $0 tax effect	0
Reclassification to equity of interest paid in kind attributable to conversion option, net of $0 tax effect	$ 2,278			2,278
Share-based compensation (in shares)	69
Share-based compensation	$ 908			908
Vesting of restricted shares and other	83	$ 1		82
Ending Balance (in shares) at Jun. 30, 2018		3,803	0
Ending Balance at Jun. 30, 2018	21,601	$ 38	$ 0	53,212	(26,981)	(4,668)
Beginning Balance (in shares) at Mar. 31, 2018		3,734	0
Beginning Balance at Mar. 31, 2018	29,551	$ 37	$ 0	51,526	(18,468)	(3,544)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(8,513)				(8,513)
Foreign currency translation adjustments, net of tax	(1,124)					(1,124)
Change in unrecognized pension and postretirement benefit costs, $0 tax effect	0
Reclassification to equity of interest paid in kind attributable to conversion option, net of $0 tax effect	1,150			1,150
Share-based compensation (in shares)		69
Share-based compensation	454			454
Vesting of restricted shares and other	83	$ 1		82
Ending Balance (in shares) at Jun. 30, 2018		3,803	0
Ending Balance at Jun. 30, 2018	21,601	$ 38	$ 0	53,212	(26,981)	(4,668)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect from adoption of the new lease standard (Leases: Topic 842) (Note 8)	(50,472)
Beginning Balance (in shares) at Dec. 31, 2018		3,803	0
Beginning Balance at Dec. 31, 2018	(9,361)	$ 38	$ 0	55,421	(50,472)	(14,348)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(16,307)				(16,307)
Foreign currency translation adjustments, net of tax	(743)					(743)
Change in unrecognized pension and postretirement benefit costs, $0 tax effect	46					46
Reclassification to equity of interest paid in kind attributable to conversion option, net of $0 tax effect	1,808			1,808
Share-based compensation	772			772
Vesting of restricted shares and other (in shares)		15	168
Vesting of restricted shares and other	101		$ (454)	555
Ending Balance (in shares) at Jun. 30, 2019		3,818	168
Ending Balance at Jun. 30, 2019	(23,438)	$ 38	$ (454)	58,556	(66,533)	(15,045)
Beginning Balance (in shares) at Mar. 31, 2019		3,803	168
Beginning Balance at Mar. 31, 2019	(16,187)	$ 38	$ (454)	57,247	(58,229)	(14,789)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(8,304)				(8,304)
Foreign currency translation adjustments, net of tax	(279)					(279)
Change in unrecognized pension and postretirement benefit costs, $0 tax effect	23					23
Reclassification to equity of interest paid in kind attributable to conversion option, net of $0 tax effect	912			912
Share-based compensation	371			371
Vesting of restricted shares and other (in shares)		15
Vesting of restricted shares and other	26			26
Ending Balance (in shares) at Jun. 30, 2019		3,818	168
Ending Balance at Jun. 30, 2019	(23,438)	$ 38	$ (454)	$ 58,556	$ (66,533)	$ (15,045)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect from adoption of the new lease standard (Leases: Topic 842) (Note 8)	$ (66,533)