Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 77,412	$ 30,767
Short-term investments		55,576
Prepaid and other current assets	3,056	2,372
Total current assets	80,468	88,715
Restricted cash	702	702
Property and equipment, net	1,771	2,766
Right-of-use assets	12,696	14,082
Total assets	95,637	106,265
Current liabilities:
Accounts payable	1,090	849
Accrued expenses	4,338	2,953
Accrued compensation	3,450	3,927
Leases, current	3,455	3,265
Total current liabilities	12,333	10,994
Long-term debt, net	15,997	15,158
Leases, net of current	12,400	13,847
Total liabilities	40,730	39,999
Commitments and Contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value, 10,000,000 shares authorized at December 31, 2021 and 2020; no shares issued or outstanding at December 31, 2021 and 2020
Common stock, $0.001 par value; 200,000,000 shares authorized at December 31, 2021 and 2020; 56,732,474 and 48,318,970 shares issued and outstanding at December 31, 2021 and 2020, respectively	57	48
Additional paid-in capital	610,655	570,841
Accumulated other comprehensive income		1
Accumulated deficit	(555,805)	(504,624)
Total stockholders’ equity	54,907	66,266
Total liabilities and stockholders’ equity	$ 95,637	$ 106,265