CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 140,437	$ 240,551
Short-term investments	35,919
Accounts receivable, net	4,281	6,348
Inventory	2,736	77
Prepaid expenses and other current assets	11,667	5,402
Total current assets	195,040	252,378
Property and equipment, net	3,909	4,236
Other assets	1,857	2,904
Total assets	200,806	259,518
Current liabilities:
Accounts payable	2,626	4,461
Current portion of notes payable	7,700
Current portion of revenue interest financing payable	1,901	1,020
Accrued expenses	18,328	19,536
Total current liabilities	30,555	25,017
Notes payable, net of deferred financing costs	64,783	71,018
Revenue interest financing payable, net of deferred financing costs	32,855	29,857
Contract liabilities, net	17,105	16,285
Other long-term liabilities	971	1,341
Total liabilities	146,269	143,518
Stockholders' equity:
Series A convertible preferred stock, $0.001 par value; 25,000,000 shares authorized, no shares issued and outstanding at September 30, 2023; 4,300 shares issued and outstanding at December 31, 2022		4,043
Common stock, $0.001 par value; 150,000,000 shares authorized, 54,580,797 issued and 54,573,490 outstanding at September 30, 2023 and 49,650,074 issued and 49,642,767 outstanding at December 31, 2022	55	50
Additional paid-in capital	584,710	542,428
Treasury stock at cost, 7,307 shares at September 30, 2023 and December 31, 2022
Accumulated other comprehensive loss	(71)
Accumulated deficit	(530,157)	(430,521)
Total stockholders' equity	54,537	116,000
Total liabilities and stockholders' equity	$ 200,806	$ 259,518