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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Current assets:    
Cash and cash equivalents $ 26,584 $ 24,289
Marketable securities available-for-sale 165,270 57,126
Accounts and other receivables 854 1,342
Inventories 312  
Intangible assets, net 1,306  
Prepaid expenses and other current assets 3,697 6,842
Total current assets 198,023 89,599
Property and equipment, net 16,619 17,174
Goodwill 2,244 1,971
Restricted cash 629 602
Other assets 1,270 334
Total assets 218,785 109,680
Current liabilities:    
Accounts payable 4,539 3,796
Accrued research and development 4,359 5,048
Accrued liabilities 9,695 11,192
Total current liabilities 18,593 20,036
Other long-term liabilities 643 443
Total liabilities 19,236 20,479
Commitments and contingencies (Note 9)
Stockholders’ equity:    
Preferred stock: $0.001 par value; 5,000 shares authorized at December 31, 2017 and December 31, 2016; no shares issued and outstanding at December 31, 2017 and December 31, 2016
Common stock: $0.001 par value; 139,000 and 69,500 shares authorized at December 31, 2017 and 2016, respectively; 61,533 and 38,599 shares issued and outstanding at December 31, 2017 and 2016, respectively 62 39
Additional paid-in capital 1,107,693 904,957
Accumulated other comprehensive loss (881) (3,624)
Accumulated deficit (907,325) (812,171)
Total stockholders’ equity 199,549 89,201
Total liabilities and stockholders’ equity $ 218,785 $ 109,680