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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Current assets    
Cash and cash equivalents $ 69,028 $ 29,627
Investments 139,522 19,472
Accounts receivable 11,806 15,266
Inventory 15,940 13,312
Prepaid expenses and other current assets 3,212 3,369
Total current assets 239,508 81,046
Property and equipment, net 26,568 30,070
Operating lease right-of-use assets, net 30,700 32,827
Long-term restricted cash 3,500 4,000
Other long-term assets 42 42
Total assets 300,318 147,985
Current liabilities    
Accounts payable 5,406 8,368
Accrued expenses 15,079 13,242
Deferred revenue, current 6,982 7,610
Operating lease liabilities, current 4,217 3,837
Notes payable, current   15,871
Deferred gain from Reverse Termination Fee 98,000  
Other liabilities, current 584 225
Total current liabilities 130,268 49,153
Deferred revenue, non-current 1,761 1,951
Operating lease liabilities, non-current 38,793 41,964
Total liabilities 170,822 93,068
Commitments and contingencies
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 179,937 shares and 153,119 shares at September 30, 2020 and December 31, 2019, respectively 180 153
Additional paid-in capital 1,241,002 1,120,999
Accumulated other comprehensive income 118 5
Accumulated deficit (1,111,804) (1,066,240)
Total stockholders' equity 129,496 54,917
Total liabilities and stockholders' equity $ 300,318 $ 147,985