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UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 58,831 $ 72,362
Restricted cash 16,350 16,193
Short-term investments 102,712 25,297
Receivables under development arrangements, net 42 2,189
Prepaid expenses and other current assets 3,863 4,537
Total current assets 181,798 120,578
Operating lease right-of-use assets 4,275 4,490
Property and equipment, net 38,755 41,328
Intangibles, net 47,411 48,253
Restricted cash, long-term 1,126 1,112
Other long-term assets 1,533 1,537
TOTAL ASSETS 274,898 217,298
Current liabilities:    
Accounts payable 1,653 1,503
Accrued expenses 15,398 19,303
Long-term debt 3,301 3,258
Operating lease obligations 1,586 1,679
Financing lease obligations 287 641
Deferred revenue 3,063 3,174
Total current liabilities 25,288 29,558
Long-term debt, net of current portion 3,745 4,660
Operating lease obligations, net of current portion 5,296 5,643
Finance lease obligations, net of current portion 29 76
Deferred tax liability, net 175 186
Deferred revenue, long-term 180 966
Other long-term liabilities 78 33
TOTAL LIABILITIES 34,791 41,122
STOCKHOLDERS' EQUITY    
Preferred stock, $0.0001 par value; 10,000,000 shares authorized; 0 shares issued and outstanding 0 0
Common stock, $0.0001 par value; 500,000,000 shares authorized; 112,998,922 and 93,087,675 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively 11 9
Additional paid-in capital 668,698 582,699
Accumulated deficit (428,470) (406,495)
Accumulated other comprehensive loss (132) (37)
TOTAL STOCKHOLDERS' EQUITY 240,107 176,176
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 274,898 $ 217,298