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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Current assets    
Cash and cash equivalents $ 28,982 $ 16,765
Investments 27,068 55,213
Accounts receivable 10,441 11,421
Inventory 15,348 15,634
Prepaid expenses and other current assets 6,501 9,978
Total current assets 88,340 109,011
Property and equipment, net 42,449 14,560
Long-term restricted cash 4,500 4,500
Other long-term assets 219 9,813
Total assets 135,508 137,884
Current liabilities    
Accounts payable 8,221 8,359
Accrued expenses 17,246 16,604
Deferred service revenue, current 6,683 7,130
Other liabilities, current 167 1,681
Notes payable, current 3,123  
Total current liabilities 35,440 33,774
Deferred service revenue, non-current 1,484 1,297
Deferred rent, non-current 14,148 19
Other liabilities, non-current 1,741 1,664
Notes payable, non-current 13,302 16,106
Financing derivative 208 356
Total liabilities 66,323 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 93,540 and 92,677 shares at March 31, 2017 and December 31, 2016, respectively 94 93
Additional paid-in-capital 880,505 872,114
Accumulated other comprehensive income (loss) (3) 5
Accumulated deficit (811,411) (787,544)
Total stockholders' equity 69,185 84,668
Total liabilities and stockholders' equity $ 135,508 $ 137,884