Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Cash	$ 8,520	$ 9,954
Prepaid expenses and other current assets	2,234	2,509
Note receivable	700	0
Total Current Assets	11,454	12,463
Property and equipment, net	215	223
Long-term note receivable	0	700
Deposits and other assets	15	37
Total Assets	11,684	13,423
Liabilities and Stockholders' Equity
Accounts payable	196	395
Total Current Liabilities	196	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	45	44
Additional paid-in capital	82,612	81,925
Accumulated deficit	(71,169)	(68,941)
Total Stockholders' Equity	11,488	13,028
Total Liabilities and Stockholders' Equity	$ 11,684	$ 13,423