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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Current assets:    
Cash and cash equivalents $ 13,683 $ 22,560
Short-term investments 47,013 45,116
Investment in marketable equity securities   3,952
Accounts receivable 12,415 6,868
Inventories 14,457 12,531
Prepaid expenses 1,221 1,274
Other current assets 1,109 1,804
Total current assets 89,898 94,105
Non-current assets:    
Property and equipment, net 2,119 2,985
Goodwill 1,316 1,316
Intangible assets, net 536 738
Restricted cash 247 184
Other assets 4,128 4,148
Total assets 98,244 103,476
Current liabilities:    
Accounts payable 10,974 8,587
Accrued liabilities 11,712 11,218
Debt - current   6,934
Deferred product revenue - current 445 149
Total current liabilities 23,131 26,888
Non-current liabilities:    
Debt - non-current 29,798 12,441
Manufacturing and development obligations - non-current 5,766 4,770
Other non-current liabilities 609 1,590
Total liabilities 59,304 45,689
Commitments and contingencies
Stockholders' equity:    
Preferred stock, $0.001 par value; 5,000 shares authorized, issuable in series; zero shares issued and outstanding at December 31, 2017 and 2016, respectively
Common stock, $0.001 par value; 225,000 shares authorized; 115,555 and 103,475 shares issued and outstanding at December 31, 2017 and 2016, respectively 115 103
Additional paid-in capital 760,225 718,299
Accumulated other comprehensive (loss) income (97) 103
Accumulated deficit (721,303) (660,718)
Total stockholders' equity 38,940 57,787
Total liabilities and stockholders' equity $ 98,244 $ 103,476