Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash	$ 6,877	$ 9,954
Prepaid expenses and other current assets	1,880	2,509
Note receivable	700	0
Total Current Assets	9,457	12,463
Property and equipment, net	155	223
Long-term note receivable	0	700
Deposits and other assets	15	37
Total Assets	9,627	13,423
Liabilities and Stockholders' Equity
Accounts payable	213	395
Accrued liabilities	16	0
Total Current Liabilities	229	395
Total Liabilities	229	395
Stockholders' Equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized, none issued and outstanding	0	0
Common stock, $0.001 par value; 100,000,000 shares authorized, 44,735,896 issued and 44,654,414 outstanding and 44,444,230 issued and 44,362,748 outstanding, respectively	45	44
Additional paid-in capital	83,019	81,925
Accumulated deficit	(73,666)	(68,941)
Total Stockholders' Equity	9,398	13,028
Total Liabilities and Stockholders' Equity	$ 9,627	$ 13,423