Consolidated Balance Sheets (Current Period Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 121,157	$ 21,164
Restricted cash	150	151
Investments	5,977	16,891
Receivables	3,238	2,115
Prepaid expenses and other current assets	4,546	1,725
Deferred collaboration expense	76	75
Total current assets	135,144	42,121
Investments	302	2,582
Furniture and equipment, net	210	306
Deferred collaboration expense	192	237
Other assets	1,277	3,620
Total assets	137,125	48,866
Liabilities and Stockholders’ Equity
Accounts payable	2,266	4,174
Accrued expenses	11,252	5,742
Interest payable	4,824	3,867
Deferred collaboration revenue	1,481	1,473
Non-recourse notes payable	30,000	0
Total current liabilities	49,823	15,256
Deferred collaboration revenue	3,848	4,736
Non-recourse notes payable	0	30,000
Stockholders’ equity:
Preferred stock, $0.001 par value; shares authorized — 5,000; no shares issued and outstanding	0	0
Common stock, $0.01 par value: shares authorized — 200,000; shares issued and outstanding — 71,861 in 2014 and 59,092 in 2013	719	591
Additional paid-in capital	538,959	420,988
Accumulated other comprehensive income	2	4
Accumulated deficit	(456,226)	(422,709)
Total stockholders’ equity (deficit)	83,454	(1,126)
Total liabilities and stockholders’ equity	$ 137,125	$ 48,866