CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 14,877	$ 13,683
Short-term investments	90,988	47,013
Accounts receivable	10,489	12,415
Inventories	13,165	14,457
Other current assets	4,257	2,330
Total current assets	133,776	89,898
Non-current assets:
Property and equipment, net	1,969	2,119
Goodwill	1,316	1,316
Intangible assets, net	486	536
Restricted cash	2,812	247
Other assets	4,062	4,128
Total assets	144,421	98,244
Current liabilities:
Accounts payable	11,231	10,974
Accrued liabilities	10,357	11,712
Debt – current	1,429
Deferred product revenue – current	639	445
Total current liabilities	23,656	23,131
Non-current liabilities:
Debt - non-current	28,387	29,798
Manufacturing and development obligations – non-current	5,996	5,766
Other non-current liabilities	784	609
Total liabilities	58,823	59,304
Commitments and contingencies
Stockholders' equity:
Common stock	131	115
Additional paid-in capital	821,081	760,225
Accumulated other comprehensive loss	(426)	(97)
Accumulated deficit	(735,188)	(721,303)
Total stockholders' equity	85,598	38,940
Total liabilities and stockholders' equity	$ 144,421	$ 98,244