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, 2011	$ 1	$ 1	$ 5	$ 456,235		$ (391,003)	$ 10,003	$ 75,242
Reverse stock split - buy back of partial shares			(1)	(115)				(116)
Stock-based compensation expense				81				81
Accrual of preferred stock dividends						(16)		(16)
Issuance of preferred stock dividends						16		16
Treasury stock repurchase					(2,901)			(2,901)
Treasury stock retirements				(2,901)	2,901
Comprehensive income (loss):
Net loss						(3,167)		(3,167)
Unrealized holding gain (loss) on available for sale investments							2,426	2,426
Unrealized foreign currency gain							857	857
Total comprehensive income (loss)								116
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 income (loss):
Net loss						(1,473)		(1,473)
Unrealized holding gain (loss) on available for sale investments							(4,626)	(4,626)
Unrealized foreign currency gain							160	160
Total comprehensive income (loss)								(5,939)
Balance at Dec. 31, 2013	$ 1	$ 1	$ 4	$ 450,394		$ (395,643)	$ 8,820	$ 63,577