Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 69,053	$ 68,441
Prepaid expenses and other current assets	3,274	2,585
Total current assets	72,327	71,026
Property and equipment, net	5,455	6,622
Right of use asset - operating lease	7,398	8,910
Other assets	1,156	1,313
Total assets	86,336	87,871
Current liabilities:
Debt, current portion	10,095	0
Accounts payable	1,550	1,601
Accrued expenses	12,478	13,068
Operating lease liability, current portion	2,177	1,951
Other current liabilities	617	742
Total current liabilities	26,917	17,362
Noncurrent liabilities:
Debt, net of current portion	36,650	46,557
Operating lease liability, net of current portion	5,935	7,785
Deferred revenue	7,500	7,500
Total liabilities	77,002	79,204
Commitments and contingencies (Note 9)
Stockholder’s equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued or outstanding as of September 30, 2022 and December 31, 2021, respectively	0	0
Common stock, $0.001 par value; 200,000,000 shares authorized; 108,473,091 and 53,576,454 shares issued and outstanding as of September 30, 2022 and December 31, 2021, respectively	108	54
Additional paid-in capital	514,907	423,308
Accumulated deficit	(505,681)	(414,695)
Total stockholders’ equity	9,334	8,667
Total liabilities and stockholders’ equity	$ 86,336	$ 87,871