Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 23,808	$ 50,366
Short-term investments	33,754	30,345
Prepaid expenses and other current assets	2,920	2,659
Total current assets	60,482	83,370
Operating lease right-of-use assets	1,418	1,645
Property and equipment, net	451	237
Other assets	121	153
Total assets	62,472	85,405
Current liabilities:
Accounts payable	5,091	1,225
Accrued expenses	5,377	5,886
Current portion of long-term notes payable	4,286	1,428
Current portion of operating lease liabilities	434	376
Total current liabilities	15,188	8,915
Long-term notes payable	5,992	8,750
Long-term operating lease liabilities	1,025	1,235
Total liabilities	22,205	18,900
Commitments and contingencies
Stockholders' equity:
Common stock, $0.0001 par value; 200,000,000 shares authorized as of June 30, 2022 and December 31, 2021; 34,352,084 and 29,455,668 shares issued and outstanding as of June 30, 2022 and December 31, 2021, respectively	3	2
Additional paid-in capital	201,936	176,618
Accumulated other comprehensive loss	(149)	(138)
Accumulated deficit	(161,523)	(109,977)
Total stockholders' equity	40,267	66,505
Total liabilities and stockholders' equity	$ 62,472	$ 85,405