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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Current assets    
Cash and cash equivalents $ 36,478 $ 16,765
Investments 66,118 55,213
Accounts receivable 9,525 11,421
Inventory 17,266 15,634
Prepaid expenses and other current assets 3,545 9,978
Total current assets 132,932 109,011
Property and equipment, net 40,289 14,560
Long-term restricted cash 4,500 4,500
Other long-term assets 184 9,813
Total assets 177,905 137,884
Current liabilities    
Accounts payable 6,514 8,359
Accrued expenses 17,840 16,604
Deferred service revenue, current 6,782 7,130
Other liabilities, current 1,915 1,681
Notes payable, current 2,643  
Total current liabilities 35,694 33,774
Deferred service revenue, non-current 1,296 1,297
Deferred rent, non-current 14,599 19
Other liabilities, non-current   1,664
Notes payable, non-current 10,441 16,106
Financing derivative 15 356
Total liabilities 62,045 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 115,562 and 92,677 shares at June 30, 2017 and December 31, 2016, respectively 116 93
Additional paid-in-capital 952,710 872,114
Accumulated other comprehensive income (loss) (16) 5
Accumulated deficit (836,950) (787,544)
Total stockholders' equity 115,860 84,668
Total liabilities and stockholders' equity $ 177,905 $ 137,884