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Consolidated Balance Sheets-Unaudited - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 102,271 $ 46,345
Short-term investments 154,468 92,012
Accounts receivable, net 685 28
Inventory 172 0
Inventory, Raw Materials, Gross 0 0
Inventory, Work in Process, Gross 0 0
Inventory, Finished Goods, Gross 172 0
Inventory, Gross 172 0
Prepaid expenses and other current assets 6,124 2,481
Total current assets 263,720 140,866
Property and equipment, net of accumulated depreciation and amortization of $4,240 and $3,984, respectively 2,202 2,071
Goodwill 44,543 44,543
Other assets 6,259 6,819
Total assets 316,724 194,299
Current liabilities:    
Accounts payable 10,501 10,395
Accrued liabilities 15,608 12,777
Total current liabilities 26,109 23,172
Other long-term liabilities 5,482 5,424
Total liabilities 130,363 77,175
Commitments and contingencies
Equity:    
Preferred stock, $0.01 par value; 5,000,000 shares authorized; no shares issued and outstanding 0 0
Common stock, $0.001 par value; 300,000,000 shares authorized; 245,792.668 and 189,213.948 shares issued, respectively 245 189
Additional paid-in capital 1,855,659 1,709,144
Accumulated deficit (1,666,558) (1,589,720)
Accumulated other comprehensive loss (100) (428)
Treasury stock, at cost, 867.973 and 488.205 shares, respectively (2,885) (2,061)
Total stockholder's equity (deficit) 186,361 117,124
Total liabilities and equity 316,724 194,299
Long-term debt, net of deferred issuance costs $ 98,772 $ 48,579