Consolidated Statements of Stockholders' (Deficit) Equity - USD ($)	Total	Cumulative effect from adoption of the new lease standard (Leases: Topic 842)	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Deficit Cumulative effect from adoption of the new lease standard (Leases: Topic 842)	Accumulated Other Comprehensive Loss
Beginning Balance (in shares) at Dec. 31, 2018			3,803,000	0
Beginning Balance at Dec. 31, 2018	$ (9,361,000)	$ 246,000	$ 38,000	$ 0	$ 55,421,000	$ (50,472,000)	$ 246,000	$ (14,348,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(16,307,000)					(16,307,000)
Foreign currency translation adjustments, net of tax	(743,000)							(743,000)
Change in unrecognized pension and postretirement benefit costs, $0 tax effect	46,000							46,000
Reclassification to equity of interest paid in kind attributable to conversion option, net of $635 tax effect	1,808,000				1,808,000
Share-based compensation	772,000				772,000
Vesting of restricted shares and other (in shares)			(15,000)	168,000
Vesting of restricted shares and other	(101,000)			$ 454,000	555,000
Ending Balance (in shares) at Jun. 30, 2019			3,818,000	168,000
Ending Balance at Jun. 30, 2019	(23,438,000)		$ 38,000	$ (454,000)	58,556,000	(66,533,000)		(15,045,000)
Beginning Balance (in shares) at Mar. 31, 2019			3,803,000	168,000
Beginning Balance at Mar. 31, 2019	(16,187,000)		$ 38,000	$ (454,000)	57,247,000	(58,229,000)		(14,789,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(8,304,000)					(8,304,000)
Foreign currency translation adjustments, net of tax	(279,000)							(279,000)
Change in unrecognized pension and postretirement benefit costs, $0 tax effect	23,000							23,000
Reclassification to equity of interest paid in kind attributable to conversion option, net of $635 tax effect	912,000				912,000
Share-based compensation	371,000				371,000
Vesting of restricted shares and other (in shares)			(15,000)
Vesting of restricted shares and other	26,000				26,000
Ending Balance (in shares) at Jun. 30, 2019			3,818,000	168,000
Ending Balance at Jun. 30, 2019	(23,438,000)		$ 38,000	$ (454,000)	58,556,000	(66,533,000)		(15,045,000)
Beginning Balance (in shares) at Dec. 31, 2019			3,818,000	168,000
Beginning Balance at Dec. 31, 2019	(41,070,000)		$ 38,000	$ (454,000)	61,461,000	(88,741,000)		(13,374,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(15,094,000)					(15,094,000)
Foreign currency translation adjustments, net of tax	(912,000)							(912,000)
Change in unrecognized pension and postretirement benefit costs, $0 tax effect	50,000							50,000
Reclassification to equity of interest paid in kind attributable to conversion option, net of $635 tax effect	305,000				305,000
Common shares issued upon conversion of debt (Note 6) (in shares)			70,261,000
Reclassification of conversion option to equity, net of $0 tax effect (Note 8)	36,952,000				36,952,000
Conversion of debt (Note 6)	(25,309,000)		$ (703,000)		(24,606,000)
Share-based compensation	436,000				436,000
Vesting of restricted shares and other	250,000				(250,000)
Ending Balance (in shares) at Jun. 30, 2020			74,079,000	168,000
Ending Balance at Jun. 30, 2020	5,726,000		$ 741,000	$ (454,000)	123,510,000	(103,835,000)		(14,236,000)
Beginning Balance (in shares) at Mar. 31, 2020			74,079,000	168,000
Beginning Balance at Mar. 31, 2020	(27,122,000)		$ 741,000	$ (454,000)	86,670,000	(99,782,000)		(14,297,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(4,053,000)					(4,053,000)
Foreign currency translation adjustments, net of tax	36,000							36,000
Change in unrecognized pension and postretirement benefit costs, $0 tax effect	25,000							25,000
Reclassification to equity of interest paid in kind attributable to conversion option, net of $635 tax effect	305,000				305,000
Reclassification of conversion option to equity, tax effect	0
Reclassification of conversion option to equity, net of $0 tax effect (Note 8)	36,952,000				36,952,000
Conversion of debt (Note 6)	639,000				639,000
Share-based compensation	222,000				222,000
Ending Balance (in shares) at Jun. 30, 2020			74,079,000	168,000
Ending Balance at Jun. 30, 2020	$ 5,726,000		$ 741,000	$ (454,000)	$ 123,510,000	$ (103,835,000)		$ (14,236,000)