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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 58,729 $ 78,297
Accounts receivable 3,584 4,500
Prepaid expenses and other current assets 1,411 2,105
Total current assets 63,724 84,902
Property, plant and equipment, net 59,671 61,257
Deferred engineering costs 110,626 110,499
Non-current restricted cash 3,443 3,440
Other non-current assets 32,806 32,897
Total assets 270,270 292,995
Current liabilities:    
Accounts payable 25,247 23,573
Accounts payable due to related parties 450 910
Accrued and other liabilities 19,897 22,003
Borrowings 16,848 72,819
Total current liabilities 62,442 119,305
Borrowings 0 38,275
Other non-current liabilities 25,922 26,325
Total long-term liabilities 25,922 64,600
Stockholders’ equity:    
Preferred stock, $0.01 par value, 100,000,000 authorized: 6,123,782 and 6,123,782 shares outstanding, respectively 61 61
Common stock, $0.01 par value, 800,000,000 authorized: 401,037,076 and 354,315,739 shares outstanding, respectively 3,779 3,309
Additional paid-in capital 1,021,373 922,042
Accumulated deficit (843,307) (816,322)
Total stockholders’ equity 181,906 109,090
Total liabilities and stockholders’ equity $ 270,270 $ 292,995
Common stock, shares authorized (in shares) 800,000,000 800,000,000