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, 2019		43,150
Balances at beginning of period at Dec. 31, 2019	(155,085)	$ 430	1,027,824	(1,179,409)	(3,930)
Net Income (Loss) Attributable to Parent	(4,012)
Balances at end of period (in shares) at Jun. 30, 2020		43,916
Balances at end of period at Jun. 30, 2020	(156,492)	$ 437	1,030,303	(1,183,421)	(3,811)
Balances at beginning of period (in shares) at Mar. 31, 2020		43,548
Balances at beginning of period at Mar. 31, 2020	(161,462)	$ 434	1,028,115	(1,185,266)	(4,745)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		368
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(535)	$ 3	(538)	0	0
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	2,726		2,726
Net Income (Loss) Attributable to Parent	1,845			1,845
Other Comprehensive Income (Loss), Net of Tax	934				934
Balances at end of period (in shares) at Jun. 30, 2020		43,916
Balances at end of period at Jun. 30, 2020	(156,492)	$ 437	1,030,303	(1,183,421)	(3,811)
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)
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)
Net Income (Loss) Attributable to Parent	11,397
Balances at end of period (in shares) at Jun. 30, 2021		45,525
Balances at end of period at Jun. 30, 2021	(129,742)	$ 452	1,029,675	(1,156,950)	(2,919)
Balances at beginning of period (in shares) at Mar. 31, 2021		45,012
Balances at beginning of period at Mar. 31, 2021	(134,574)	$ 448	1,032,068	(1,163,956)	(3,134)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		513
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(5,969)	$ 4	(5,973)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	3,580		3,580
Net Income (Loss) Attributable to Parent	7,006			7,006
Other Comprehensive Income (Loss), Net of Tax	215				215
Balances at end of period (in shares) at Jun. 30, 2021		45,525
Balances at end of period at Jun. 30, 2021	$ (129,742)	$ 452	$ 1,029,675	$ (1,156,950)	$ (2,919)