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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 37,190 $ 41,562
Grant receivables 2,393 3,672
Prepaid expenses and other current assets 1,968 2,413
Total current assets 41,551 47,647
Property and equipment, net 248 233
Right-of-use assets, operating leases 736 813
Other assets 1,425 1,732
Total assets 43,960 50,425
Current liabilities:    
Accounts payable 4,060 3,216
Accrued expenses 2,415 2,094
Deferred grant income, current 1,056 1,702
Operating lease liabilities, current 166 149
Other current liabilities 217 634
Total current liabilities 7,914 7,795
Operating lease liabilities, noncurrent 608 695
Deferred grant income and other liabilities, noncurrent 1,052 1,686
Total liabilities 9,574 10,176
Commitments and contingencies (Note 6)
Stockholders' equity:    
Preferred stock, $0.001 par value, 10,000,000 shares authorized; no shares issued and outstanding at June 30, 2023 and December 31, 2022
Common stock, $0.001 par value, 250,000,000 shares authorized; 30,286,582 and 28,991,548 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively 30 29
Additional paid-in capital 160,851 155,820
Accumulated deficit (126,299) (115,401)
Accumulated other comprehensive loss (196) (199)
Total stockholders' equity 34,386 40,249
Total liabilities and stockholders' equity $ 43,960 $ 50,425