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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
CURRENT ASSETS:    
Cash and cash equivalents $ 104,027 $ 117,472
Restricted cash 713 771
Accounts receivable, less allowance of $191 and $180 as of March 31, 2023 and December 31, 2022, respectively 3,018 2,103
Unbilled receivables 713 454
Inventory 5,744 4,622
Prepaid expenses and other current assets 2,923 3,194
Due from related parties   48
Total current assets 117,138 128,664
Property and equipment, net 3,091 3,248
Other long term assets 1,873 2,139
Total assets 122,102 134,051
CURRENT LIABILITIES:    
Accounts payable 1,668 678
Deferred grant funding 713 771
Deferred revenue 1,415 1,378
Due to related parties 64  
Accrued expenses and other current liabilities 4,141 5,976
Total current liabilities 8,001 8,803
Long term deferred revenue 1,364 1,526
Total liabilities 9,365 10,329
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY:    
Additional paid-in capital 334,374 333,199
Accumulated deficit (221,644) (209,484)
Total stockholders' equity 112,737 123,722
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY 122,102 134,051
Class A Common Stock    
STOCKHOLDERS' EQUITY:    
Common stock 5 5
Class B Common Stock    
STOCKHOLDERS' EQUITY:    
Common stock $ 2 $ 2