UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 21,198	$ 34,644
Short-term investments	997	4,497
Prepaid expenses and other assets	2,526	4,525
Total current assets	24,721	43,666
Property and equipment, net	3,325	3,927
Right-of-use asset	7,609	7,950
Other noncurrent assets	1,300	9,325
Total assets	36,955	64,868
Current liabilities:
Current portion of long-term debt	0	6,873
Accounts payable	1,593	3,413
Accrued expenses and other current liabilities	3,308	6,464
Deferred revenue, current	14,755	17,317
Total current liabilities	19,656	34,067
Deferred revenue, noncurrent	9,035	11,509
Lease liability, noncurrent	7,101	7,404
Other noncurrent liabilities	0	656
Total liabilities	35,792	53,636
Stockholders’ equity:
Preferred stock, $0.0001 par value per share; 10,000,000 shares authorized, no shares issued and outstanding, June 30, 2022 and December 31, 2021	0	0
Common stock, $0.0001 par value per share; 200,000,000 shares authorized, 4,962,231 issued and outstanding, June 30, 2022; 3,626,073 issued and outstanding, December 31, 2021	0	0
Additional paid-in capital	187,053	181,301
Accumulated other comprehensive loss	(5)	(2)
Accumulated deficit	(185,885)	(170,067)
Total stockholders' equity	1,163	11,232
Total liabilities and stockholders’ equity	$ 36,955	$ 64,868