Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Series G1 Convertible Preferred Stock	Series G2 Convertible Preferred Stock	Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income	Total
Balance at Dec. 31, 2012	$ 1	$ 1	$ 4	$ 453,300		$ (394,170)	$ 13,286	$ 72,422
Stock-based compensation expense				60				60
Accrual of preferred stock dividends						(16)		(16)
Issuance of preferred stock dividends						16		16
Treasury stock repurchase					(2,966)			(2,966)
Treasury stock retirements				(2,966)	2,966
Comprehensive loss:
Net loss						(1,473)		(1,473)
Unrealized loss on available for sale investments							(4,626)	(4,626)
Unrealized foreign currency gain (loss)							160	160
Total comprehensive loss								(5,939)
Balance at Dec. 31, 2013	1	1	4	450,394		(395,643)	8,820	63,577
Stock-based compensation expense				212				212
Accrual of preferred stock dividends						(15)		(15)
Issuance of preferred stock dividends						15		15
Preferred stock repurchase	(1)	(1)				(78)		(80)
Treasury stock repurchase					(847)			(847)
Treasury stock retirements				(847)	847
Other				3				3
Comprehensive loss:
Net loss						(23,959)		(23,959)
Unrealized loss on available for sale investments							(9,209)	(9,209)
Unrealized foreign currency gain (loss)							(548)	(548)
Impairment loss recognized on investment in Global							937	937
Total comprehensive loss								(32,779)
Balance at Dec. 31, 2014			$ 4	$ 449,762		$ (419,680)		$ 30,086