CONSOLDATED STATEMENTS OF STOCKHOLDERS' DEFICIT Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]
Balances at beginning of period at Dec. 31, 2018	$ (166,661)	$ 423	$ 1,028,924	$ (1,187,010)	$ (5,231)	$ (3,767)
Balances at beginning of period (in shares) at Dec. 31, 2018		42,339			(391)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(1,381)	$ 0	(6,612)	0	$ (5,231)	0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		0			391
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	1,738		1,738
Net Income (Loss) Attributable to Parent	(213)			(213)
Other Comprehensive Income (Loss), Net of Tax	(548)					(548)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	(23)		(23)
Capped Call Transaction Cost Reimbursement	1		1
Balances at end of period at Mar. 31, 2019	(167,087)	$ 423	1,024,028	(1,187,223)	$ 0	(4,315)
Balances at end of period (in shares) at Mar. 31, 2019		42,339			0
Balances at beginning of period at Dec. 31, 2019	(155,085)	$ 430	1,027,824	(1,179,409)	$ 0	(3,930)
Balances at beginning of period (in shares) at Dec. 31, 2019		43,150			0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(1,814)	$ (4)	(1,818)	0	$ 0	0
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		398			0
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 at Mar. 31, 2020	$ (161,462)	$ 434	$ 1,028,115	$ (1,185,266)	$ 0	$ (4,745)
Balances at end of period (in shares) at Mar. 31, 2020		43,548			0