Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 106,325	$ 45,917
Marketable securities, available for sale	1,598	44,363
Prepaid expenses and other current assets	1,502	2,697
Total current assets	109,425	92,977
Property and equipment, net	78	98
Other non-current assets	867	1,086
Total assets	110,370	94,161
Current liabilities:
Accounts payable	5,241	6,362
Accrued expenses	3,176	9,330
Total current liabilities	8,417	15,692
Non-current liabilities:
Long-term debt, net of discount	29,772	29,435
Restricted stock repurchase liability	0	2
Total liabilities	38,189	45,129
Commitments and contingencies (see Note 12)
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of June 30, 2023 and December 31, 2022; no shares issued or outstanding as of June 30, 2023 and December 31, 2022, respectively	0	0
Common stock, $0.0001 par value; 500,000,000 shares authorized as of June 30, 2023 and December 31, 2022, respectively; 42,420,139 and 23,345,115 shares issued as of June 30, 2023 and December 31, 2022, respectively; 42,381,952 and 23,312,529 shares outstanding as of June 30, 2023 and December 31, 2022, respectively	4	2
Additional paid-in capital	249,668	199,492
Accumulated other comprehensive loss	(2)	(161)
Treasury stock, 38,187 and 28,641 shares as of June 30, 2023 and December 31, 2022, respectively; at cost	(54)	(35)
Accumulated deficit	(177,435)	(150,266)
Total stockholders' equity	72,181	49,032
Total liabilities and stockholders' equity	$ 110,370	$ 94,161