CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 132,038	$ 157,352
Restricted cash	1,371	1,055
Accounts receivable	17,862	13,267
Inventories	9,596	6,424
Prepaid expenses and other assets	4,558	3,301
Total current assets	165,425	181,399
Noncurrent assets:
Property and equipment, net	7,594	7,644
Goodwill	12,223	12,223
Intangible assets, net	176,731	216,463
Other assets	1,994	1,761
Total Assets	363,967	419,490
Current liabilities:
Accounts payable	4,857	5,423
Accrued liabilities	23,639	22,630
Note payable, current portion	10,959	10,846
Total current liabilities	39,455	38,899
Noncurrent liabilities:
Contingent consideration liability	152,070	166,800
Deferred tax liability	615	303
Note payable, net of current portion	33,479	36,296
Convertible notes	60,000	60,000
Total liabilities	285,619	302,298
Stockholders' equity:
Preferred stock, $0.001 par value per share, 15,000,000 shares authorized, zero shares issued and outstanding		0
Common stock, $0.001 par value per share, 150,000,000 shares authorized, 85,289,311 and 85,235,591 shares issued and outstanding at March 31, 2016 and December 31, 2015, respectively	85	85
Additional paid-in capital	444,299	441,601
Accumulated other comprehensive loss	(1,334)	(1,377)
Accumulated deficit	(364,702)	(323,117)
Total stockholders' equity	78,348	117,192
Total Liabilities and Stockholders' Equity	$ 363,967	$ 419,490