CONSOLDATED STATEMENTS OF STOCKHOLDERS' DEFICIT Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Balances at beginning of period (in shares) at Dec. 31, 2019		43,150
Balances at beginning of period at Dec. 31, 2019	$ (155,085)	$ 430	$ 1,027,824	$ (1,179,409)	$ (3,930)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		398
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(1,814)	$ 4	(1,818)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	2,109		2,109
Net Income (Loss) Attributable to Parent	(5,857)			(5,857)
Other Comprehensive Income (Loss), Net of Tax	(815)				(815)
Balances at end of period (in shares) at Mar. 31, 2020		43,548
Balances at end of period at Mar. 31, 2020	(161,462)	$ 434	1,028,115	(1,185,266)	(4,745)
Balances at beginning of period (in shares) at Dec. 31, 2020		44,420
Balances at beginning of period at Dec. 31, 2020	(132,924)	$ 442	1,036,658	(1,168,347)	(1,677)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		592
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(7,706)	$ 6	(7,712)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	3,122		3,122
Net Income (Loss) Attributable to Parent	4,391			4,391
Other Comprehensive Income (Loss), Net of Tax	(1,457)				(1,457)
Balances at end of period (in shares) at Mar. 31, 2021		45,012
Balances at end of period at Mar. 31, 2021	$ (134,574)	$ 448	$ 1,032,068	$ (1,163,956)	$ (3,134)