Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Series B [Member]	Series E [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accum Deficit [Member]
Balances, beginning balance at Dec. 31, 2010	$ 6,291	$ 0	$ 6,855	$ 232	$ 126,545	$ (127,341)
Balances, shares, beginning balance at Dec. 31, 2010		44	1,731	23,160
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Declared and paid dividends on preferred stock, shares				59
Declared and paid dividends on preferred stock	0	0	0	0	114	(114)
Common stock issued from exercise of rights offering, shares		0	0	6,629
Common stock issued from exercise of rights offering	17,574	0	0	66	17,508	0
Stock issuance costs	(177)	0	0	0	(177)	0
Share based compensation, shares		0	0	83
Stock-based compensation	1,215	0	0	1	1,214	0
Net loss	(24)	0	0	0	0	(24)
Balances, ending balance at Dec. 31, 2011	24,879	0	6,855	299	145,204	(127,479)
Balances, shares, endings balance at Dec. 31, 2011		44	1,731	29,931
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Declared and paid dividends on preferred stock, shares		0		92
Declared and paid dividends on preferred stock	0	0	0	0	233	(233)
Common stock issued from exercise of rights offering, shares		0	0	0
Common stock issued from exercise of rights offering	0	0	0	0	0	0
Stock issuance costs	0	0	0	1	(1)	0
Share based compensation, shares		0	0	0
Stock-based compensation	647	0	0	0	647	0
Net loss	(713)	0	0	0	0	(713)
Balances, ending balance at Dec. 31, 2012	$ 24,813	$ 0	$ 6,855	$ 300	$ 146,083	$ (128,425)
Balances, shares, endings balance at Dec. 31, 2012		44	1,731	30,073