Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 73,799	$ 54,097
Restricted cash	305	305
Short-term investments	12,482	82,034
Accounts receivable	442	41
Prepaid expenses and other current assets	3,608	4,565
Total current assets	90,636	141,042
Property and equipment, net	644	919
Operating lease right-of-use asset	1,753	2,596
Prepaid expenses and other long-term assets	109
Total assets	93,142	144,557
Current liabilities:
Accounts payable	1,217	2,681
Accrued expenses and other current liabilities	3,385	5,616
Deferred revenue	173	106
Operating lease liability	774	826
Note payable, short term	7,500	4,375
Total current liabilities	13,049	13,604
Note payable, long term	5,209	10,442
Operating lease liability, net of current portion	1,928	2,485
Corporate bond, net of bond discount	1,999	1,834
Earn-out liabilities	1,841	5,513
Other long-term liabilities	22
Total liabilities	24,048	33,878
Commitments and contingencies
Stockholders' equity
Common stock, $0.0001 par value: 1,000,000,000 shares authorized; 78,309,213 and 78,022,924 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively	8	8
Additional paid-in capital	357,720	350,980
Accumulated deficit	(288,634)	(240,288)
Accumulated other comprehensive loss		(21)
Total stockholders' equity	69,094	110,679
Total liabilities and stockholders' equity	$ 93,142	$ 144,557