Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 56,255	$ 88,539
Marketable securities	43,997	12,108
Other receivables	586	1,028
Inventories	9,373	0
Prepaid expenses and other current assets	2,769	2,277
Total current assets	112,980	103,952
Property and equipment, net	422	455
Facility and equipment under lease	1,869	2,505
Other assets	3,658	4,636
Total assets	118,929	111,548
Current liabilities:
Accounts payable and other accrued liabilities	42,011	41,258
Accrued payroll and benefits	7,613	11,971
Total current liabilities	49,624	53,229
Loan payable, long-term	28,488	0
Other long-term liabilities	4,965	10,766
Total liabilities	83,077	63,995
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, $0.001 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; 203,339,656 and 164,502,013 issued and outstanding at September 30, 2022 and December 31, 2021, respectively	203	165
Additional paid-in capital	1,148,996	1,094,353
Accumulated other comprehensive loss	(3,009)	(3,042)
Accumulated deficit	(1,110,338)	(1,043,923)
Total stockholders’ equity	35,852	47,553
Total liabilities and stockholders’ equity	$ 118,929	$ 111,548