Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets
Cash	$ 5,145	$ 9,954
Prepaid expenses and other current assets	1,647	2,509
Total Current Assets	6,792	12,463
Property and equipment, net	157	223
Long-term note receivable	0	700
Deposits and other assets	4	37
Total Assets	6,953	13,423
Liabilities and Stockholders' Equity
Accounts payable	584	395
Total Liabilities	584	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, respectively, and 44,444,230 issued and 44,362,748 outstanding, respectively	45	44
Additional paid-in capital	83,358	81,925
Accumulated deficit	(77,034)	(68,941)
Total Stockholders' Equity	6,369	13,028
Total Liabilities and Stockholders' Equity	$ 6,953	$ 13,423