Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Series G1 Preferred Stock [Member]	Series G2 Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Stockholders' equity balance at Dec. 31, 2010	$ 1	$ 1	$ 3	$ 439,065		$ 3,591	$ (388,039)	$ 10,491	$ 65,113
Issuance of restricted shares related to investment				3,244		(3,264)			(20)
Issuance of shares related to the rights offering, net of costs			2	14,745					14,747
Accrual of preferred stock dividends							(16)		(16)
Issuance of preferred stock dividends							16		16
Treasury stock repurchase					(819)				(819)
Treasury stock retirements				(819)	819
Net loss							(2,964)		(2,964)
Unrealized holding gain/loss on available for sale investments								(482)	(482)
Unrealized foreign currency gain/loss								(6)	(6)
Total comprehensive income/loss									(3,452)
Noncontrolling interest in investment						(327)			(327)
Stockholders' equity 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
Net loss							(3,167)		(3,167)
Unrealized holding gain/loss on available for sale investments								2,426	2,426
Unrealized foreign currency gain/loss								857	857
Total comprehensive income/loss									116
Stockholders' equity balance at Dec. 31, 2012	$ 1	$ 1	$ 4	$ 453,300			$ (394,170)	$ 13,286	$ 72,422