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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Current assets    
Cash and cash equivalents $ 25,931 $ 16,765
Investments 58,034 55,213
Accounts receivable 8,897 11,421
Inventory 18,201 15,634
Prepaid expenses and other current assets 2,548 9,978
Total current assets 113,611 109,011
Property and equipment, net 39,605 14,560
Long-term restricted cash 4,500 4,500
Other long-term assets 188 9,813
Total assets 157,904 137,884
Current liabilities    
Accounts payable 8,574 8,359
Accrued expenses 11,232 16,604
Deferred service revenue, current 6,151 7,130
Other liabilities, current 1,428 1,681
Notes payable, current 2,907  
Total current liabilities 30,292 33,774
Deferred service revenue, non-current 1,074 1,297
Deferred rent, non-current 14,504 19
Other liabilities, non-current   1,664
Notes payable, non-current 10,456 16,106
Financing derivative 170 356
Total liabilities 56,496 53,216
Commitments and contingencies (Note 7)
Stockholders' equity    
Preferred Stock, $0.001 par value: Authorized 50,000 shares; No shares issued or outstanding
Common Stock, $0.001 par value: Authorized 1,000,000 shares; Issued and outstanding 116,239 and 92,677 shares at September 30, 2017 and December 31, 2016, respectively 116 93
Additional paid-in-capital 960,265 872,114
Accumulated other comprehensive income (loss) (2) 5
Accumulated deficit (858,971) (787,544)
Total stockholders' equity 101,408 84,668
Total liabilities and stockholders' equity $ 157,904 $ 137,884