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Balance Sheets - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Current assets    
Cash and cash equivalents $ 123,436,000 $ 96,576,000
Short-term marketable securities (amortized cost of $564,036 and $479,791, respectively) 564,833,000 480,290,000
Accounts receivable, net 10,047,000 12,676,000
Inventory 14,063,000 9,069,000
Prepaid expenses and other current assets 14,535,000 14,079,000
Total current assets 726,914,000 612,690,000
Long-term assets    
Property and equipment, net 39,692,000 60,355,000
Operating lease right-of-use assets 99,350,000  
Long-term marketable securities (amortized cost of $118,429 and $105,263, respectively) 118,525,000 105,435,000
Restricted cash 2,138,000 2,138,000
Intangible assets, net 10,225,000 11,928,000
Goodwill 118,972,000 118,972,000
Other assets 598,000 784,000
Total assets 1,116,414,000 912,302,000
Current liabilities    
Accounts payable 3,237,000 4,453,000
Accrued liabilities 13,162,000 4,371,000
Accrued compensation and benefits 11,950,000 8,124,000
Current portion of deferred rent   371,000
Current portion of operating lease liabilities 3,529,000  
Current portion of deferred revenue 73,319,000 60,994,000
Total current liabilities 105,197,000 78,313,000
Long-term liabilities    
Deferred rent liability, less current portion   6,918,000
Operating lease liabilities, less current portion 104,333,000  
Financing obligation   36,607,000
Deferred revenue, less current portion 163,618,000 219,332,000
Other long-term liabilities   93,000
Total liabilities 373,148,000 341,263,000
Commitments and contingencies (Note 11)
Shareholders’ equity    
Preferred stock: $0.0001 par value, 10,000,000 shares authorized at December 31, 2020 and 2019; no shares issued and outstanding at December 31, 2020 and 2019
Common stock: $0.0001 par value, 340,000,000 shares authorized at December 31, 2020 and 2019; 137,646,896 and 125,238,142 shares issued and outstanding at December 31, 2020 and 2019, respectively 14,000 12,000
Additional paid-in capital 1,253,971,000 935,834,000
Accumulated other comprehensive gain 893,000 671,000
Accumulated deficit (511,612,000) (365,478,000)
Total shareholders’ equity 743,266,000 571,039,000
Total liabilities and shareholders’ equity $ 1,116,414,000 $ 912,302,000