Condensed Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities:
Net loss	$ (3,807,000)	$ (6,886,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Loss from disposition of assets		1,000
Non-employee stock option expense	2,000	4,000
Stock-based compensation	253,000	588,000
Increase in fair value of warrant liability		1,321,000
Depreciation expense	42,000	83,000
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	22,000	(2,000)
Accounts payable, accrued expenses, and other liabilities	(211,000)	(889,000)
Net cash used in operating activities	(3,699,000)	(5,780,000)
Cash Flows from Investing Activities:
Purchases of property and equipment	(1,000)
Net cash used in investing activities	(1,000)
Cash Flows from Financing Activities:
Dividends paid	(160,000)	(103,000)
2012 financing transaction costs paid in 2013	(87,000)
Proceeds from employee stock purchases	1,000	1,000
Payments on capital lease	(1,000)
Net cash (used in) financing activities	(247,000)	(102,000)
Net (decrease) in cash and cash equivalents	(3,947,000)	(5,882,000)
Cash and cash equivalents, beginning of period	10,096,000	24,571,000
Cash and cash equivalents, end of period	$ 6,149,000	$ 18,689,000