Consolidated Balance Sheets-Unaudited - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 18,834	$ 64,065
Short-term investments	117,369	22,678
Accounts receivable, net	39	14
Prepaid expenses and other current assets	2,821	2,164
Total current assets	139,063	88,921
Property and equipment, net of accumulated depreciation and amortization of $5,177 and $4,853, respectively	932	1,176
Goodwill	44,543	44,543
Other assets	7,147	2,269
Total assets	191,685	136,909
Current liabilities:
Accounts payable	9,427	9,152
Accrued liabilities	9,018	12,972
Total current liabilities	18,445	22,124
Other long-term liabilities	5,438	1,190
Total liabilities	47,667	23,314
Commitments and contingencies
Equity:
Preferred stock, $0.01 par value; 5,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value; 300,000 shares authorized; 189,214 and 150,082 shares issued, respectively	189	150
Additional paid-in capital	1,705,607	1,608,749
Accumulated deficit	(1,559,226)	(1,487,776)
Accumulated other comprehensive loss	(491)	(10)
Treasury stock, at cost, 488 and 1,165 shares, respectively	(2,061)	(7,518)
Total stockholder's equity (deficit)	144,018	113,595
Total liabilities and equity	191,685	136,909
Long-term debt, net of deferred issuance costs	$ 23,784	$ 0