Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 53,148	$ 77,412
Prepaid and other current assets	3,200	3,056
Total current assets	56,348	80,468
Restricted cash	702	702
Property and equipment, net	1,812	1,771
Right-of-use assets	11,898	12,696
Total assets	70,760	95,637
Current liabilities:
Accounts payable	2,195	1,090
Accrued expenses	3,069	4,338
Accrued compensation	2,432	3,450
Long-term debt, current	457
Leases, current	3,505	3,455
Total current liabilities	11,658	12,333
Long-term debt, net of current	15,627	15,997
Leases, net of current	11,398	12,400
Total liabilities	38,683	40,730
Commitments and Contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized at March 31, 2022 and December 31, 2021; no shares issued or outstanding at March 31, 2022 and December 31, 2021	0	0
Common stock, $0.001 par value; 200,000,000 shares authorized at June 30, 2022 and December 31, 2021; 56,990,363 and 56,732,474 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	57	57
Additional paid-in capital	614,458	610,655
Accumulated deficit	(582,438)	(555,805)
Total stockholders’ equity	32,077	54,907
Total liabilities and stockholders’ equity	$ 70,760	$ 95,637