Annual report pursuant to Section 13 and 15(d)

Accrued Expenses and Other Current Liabilities (Details)

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Accrued Expenses and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accrued Expenses    
Accrued interest expense $ 34 $ 4,708
Accrued property and equipment purchases 3,992  
Accrued research and development costs 2,420 2,195
Accrued professional fees 1,386 160
Accrued business combination costs 815  
Short term lease liability 444 368
Other accrued expenses 1,534 703
Total accrued expenses $ 10,625 $ 8,134