CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 12,880	$ 71,018
Short-term investments	63,396	25,698
Investment in marketable equity securities	4,930	11,163
Accounts receivable	7,441	5,794
Inventories	12,202	10,812
Prepaid expenses	1,723	1,166
Other current assets	5,457	4,755
Total current assets	108,029	130,406
Non-current assets:
Property and equipment, net	3,206	3,549
Goodwill	1,316	1,316
Intangible assets, net	789	940
Restricted cash	578	612
Other assets	2,207	2,579
Total assets	116,125	139,402
Current liabilities:
Accounts payable	6,859	5,217
Accrued liabilities	10,170	9,853
Manufacturing and development obligations - current		3,282
Debt - current	4,969	2,956
Deferred product revenue - current	892	554
Total current liabilities	22,890	21,862
Non-current liabilities:
Debt - non-current	14,382	16,848
Deferred income taxes	140	122
Manufacturing and development obligations - non-current	5,004	4,542
Other non-current liabilities	1,396	1,263
Total liabilities	43,812	44,637
Commitments and contingencies
Stockholders' equity:
Common stock	103	99
Additional paid-in capital	716,189	685,189
Accumulated other comprehensive income	3,238	7,289
Accumulated deficit	(647,217)	(597,812)
Total stockholders' equity	72,313	94,765
Total liabilities and stockholders' equity	$ 116,125	$ 139,402