CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 18,658	$ 19,173
Investments available for sale	22,571	19,815
Prepaid expenses - current	653	357
Total current assets	41,882	39,345
Prepaid expenses - non-current	3,144	0
Property and equipment, net	64	53
Total assets	45,090	39,398
Current liabilities:
Accounts payable and accrued liabilities	3,554	1,748
Royalty payable	6,100	0
Related-party payable	81	0
Income tax liability	408	395
Deferred revenue, current portion	1,500	667
Derivative liability	320	2,564
Total current liabilities	11,963	5,374
Deferred revenue, non-current portion	500	0
Commitments and contingencies (Note 5)
Stockholders' equity:
Preferred stock, par value $0.0001 per share Authorized: 10,000,000 shares at December 31, 2014 and 2013, Issued and outstanding: 0 shares at December 31, 2014 and 2013	0	0
Common stock, par value $0.0001 per share Authorized: 100,000,000 shares at December 31, 2014 and 2013, Issued and outstanding: 51,996,701 shares and 51,236,141 shares, at December 31, 2014 and 2013, respectively	5	5
Additional paid-in capital	133,072	124,589
Accumulated deficit	(100,435)	(90,533)
Accumulated other comprehensive loss	(15)	(37)
Total stockholders' equity	32,627	34,024
Total liabilities and stockholders' equity	$ 45,090	$ 39,398