Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 56,266	$ 54,097
Restricted cash	305	305
Short-term investments	49,576	82,034
Accounts receivable	84	41
Prepaid expenses and other current assets	2,493	4,565
Total current assets	108,724	141,042
Property and equipment, net	715	919
Operating lease right-of-use asset	1,929	2,596
Prepaid expenses and other long-term assets	95
Total assets	111,463	144,557
Current liabilities:
Accounts payable	1,457	2,681
Accrued expenses and other current liabilities	3,227	5,616
Deferred revenue	176	106
Operating lease liability	791	826
Note payable, short term	7,500	4,375
Total current liabilities	13,151	13,604
Note payable, long term	6,965	10,442
Operating lease liability, net of current portion	2,122	2,485
Corporate bond, net of bond discount	1,943	1,834
Earn-out liabilities	4,297	5,513
Other long-term liabilities	22
Total liabilities	28,500	33,878
Commitments and contingencies
Stockholders' equity
Common stock, $0.0001 par value: 1,000,000,000 shares authorized; 78,174,532 and 78,022,924 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively	8	8
Additional paid-in capital	355,738	350,980
Accumulated deficit	(272,758)	(240,288)
Accumulated other comprehensive loss	(25)	(21)
Total stockholders' equity	82,963	110,679
Total liabilities and stockholders' equity	$ 111,463	$ 144,557