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Balance Sheet - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current assets          
Cash and cash equivalents $ 42,683 $ 77,094   $ 4,864  
Prepaid expenses 4,147 4,147   3,976  
Accounts receivable 7,549 4,833   2,790  
Total current assets 54,379 86,074   11,630  
Noncurrent assets          
Property, plant and equipment, net 5,569 4,960   5,025  
In-process research and development 16,900 16,900   16,900  
Intangible assets, net 1,192 1,236   1,413  
Goodwill 8,255 8,255   8,255  
Other assets 4,777 3,772   3,834  
Total Assets 91,072 121,197   47,057  
Current liabilities          
Accounts payable and accrued expenses 20,002 22,375   16,700  
Accrued compensation 4,788 10,552   4,993  
Convertible note payable 14,147 14,041   13,621  
Promissory note - related party       20,293  
Deferred DOE cost share   104   13,358  
Other accrued liabilities 2,660 1,440      
Other accrued liabilities   1,336   1,579  
Total current liabilities 41,597 48,408   70,544  
Noncurrent liabilities   2,976   3,245  
Deferred revenue 642 1,415   267  
Total liabilities 45,149 52,799   74,056  
Mezzanine equity 2,140 2,140   2,140  
Members' equity          
Convertible preferred units 819,694 819,694   629,089  
Common units 29,082 28,184   20,899  
Accumulated deficit (804,993) (781,620)   (679,127)  
Total members' equity 43,783 66,258 $ (8,133) (29,139) $ 36,658
Total Liabilities, Class A Ordinary Shares Subject to Possible Redemption and Shareholders' Deficit $ 91,072 $ 121,197   $ 47,057