CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 92,857 $ 113,151
Accounts receivable 4,738 1,537
Receivable research incentives 10,950 8,190
Prepaid expenses and other current assets 9,348 5,139
Total current assets 117,893 128,017
Non-current assets:    
Restricted cash 425 424
Property and equipment, net 6,030 5,126
Operating lease right of use assets 6,949 7,875
Finance lease right of use assets 1,399 1,602
Other non-current assets 572 701
Total non-current assets 15,375 15,728
Total assets 133,268 143,745
Current liabilities    
Accounts payable 6,965 944
Deferred revenues 4,365 3,591
Operating lease liabilities, current 1,841 1,814
Accrued expenses and other current liabilities 5,400 8,406
Total current liabilities 18,571 14,755
Non-current liabilities    
Loans payable, non-current 3,818 3,495
Operating lease liabilities, non-current 4,398 5,290
Deferred revenues, non-current 760 72
Other non-current liabilities 1,806 2,234
Total non-current liabilities 10,782 11,091
Total liabilities 29,353 25,846
Stockholders' equity:    
Additional paid-in capital 229,828 225,568
Accumulated other comprehensive loss (4,879) (4,653)
Accumulated deficit (121,037) (103,019)
Total stockholders' equity 103,915 117,899
Total liabilities, convertible preferred stock and stockholders' equity 133,268 143,745
Common stock    
Stockholders' equity:    
Common stock 3 3
Class A common stock    
Stockholders' equity:    
Common stock $ 0 $ 0