Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 27,957	$ 46,842
Restricted cash	0	215
Accounts receivable, net	4,521	4,633
Prepaid expenses and other current assets	2,016	2,324
Total current assets	34,494	54,014
Property and equipment, net	3,213	3,622
Right-of-use assets, operating leases	3,844	1,660
Other non-current assets	533	535
Total assets	42,084	59,831
Current liabilities:
Accounts payable	1,011	975
Accrued expenses and other current liabilities	3,513	6,176
Note payable, current	0	2,226
Operating lease liabilities	1,645	2,006
Total current liabilities	6,169	11,383
Note payable, net of current	0	1,094
Operating lease liabilities, non-current	2,199	0
Other long-term liabilities	1,002	1,096
Total liabilities	9,370	13,573
Commitments and contingencies (Note 15)
Stockholders' equity:
Convertible preferred stock, $0.001 par value - 10,000 shares authorized, no shares issued and outstanding at December 31, 2022 and 2021, respectively	0	0
Common stock, $0.001 par value - 142,857 shares authorized, 17,226 and 15,532 shares issued and outstanding at December 31, 2022 and 2021, respectively	17	15
Additional paid-in capital	355,996	351,394
Accumulated deficit	(322,334)	(304,107)
Accumulated other comprehensive loss	(965)	(1,044)
Total stockholders' equity	32,714	46,258
Total liabilities and stockholders' equity	$ 42,084	$ 59,831