CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Current assets:    
Cash and cash equivalents $ 14,865 $ 225,848
Assets held for sale 4,070 0
Prepaid expenses and other current assets 1,260 3,975
Total current assets 20,195 229,823
Operating lease, right-of-use-asset 2,679 35,095
Property, plant and equipment, net 146 51,530
Restricted cash 50 1,573
Total assets 23,070 318,021
Current liabilities:    
Accounts payable 1,232 11,572
Accrued expenses and other current liabilities 5,607 14,072
Operating lease liabilities 1,100 9,015
Total current liabilities 7,939 34,659
Long-term debt, net of discount 0 76,154
Other long-term liabilities 0 135
Operating lease liabilities, net of current portion 0 28,291
Total liabilities 7,939 139,239
Commitments and contingencies (see Note 10)
Stockholders' equity:    
Preferred stock, $0.001 par value; 10,000,000 shares authorized at December 31, 2022 and December 31, 2021; no shares issued or outstanding at December 31, 2022 and December 31, 2021 0 0
Common stock, $0.001 par value; 300,000,000 and 150,000,000 shares authorized at December 31, 2022 and December 31, 2021, respectively; 90,387,732 and 90,063,770 shares issued and outstanding at December 31, 2022 and December 31, 2021, respectively 90 90
Additional paid-in capital 871,725 855,710
Accumulated deficit (856,684) (677,018)
Total stockholders' equity 15,131 178,782
Total liabilities and stockholders' equity $ 23,070 $ 318,021