Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 26,244	$ 50,366
Short-term investments	42,579	30,345
Prepaid expenses and other current assets	3,262	2,659
Total current assets	72,085	83,370
Operating lease right-of-use assets	1,541	1,645
Property and equipment, net	464	237
Other assets	145	153
Total assets	74,235	85,405
Current liabilities:
Accounts payable	4,210	1,225
Accrued expenses	5,626	5,886
Current portion of long-term notes payable	2,857	1,428
Current portion of operating lease liabilities	420	376
Total current liabilities	13,113	8,915
Long-term notes payable	7,370	8,750
Long-term operating lease liabilities	1,122	1,235
Total liabilities	21,605	18,900
Commitments and contingencies
Stockholders' equity:
Common stock, $0.0001 par value; 200,000,000 shares shares authorized as of March 31, 2022 and December 31, 2021; 34,275,898 and 29,455,668 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively	3	2
Additional paid-in capital	200,475	176,618
Accumulated other comprehensive loss	(454)	(138)
Accumulated deficit	(147,394)	(109,977)
Total stockholders' equity	52,630	66,505
Total liabilities and stockholders' equity	$ 74,235	$ 85,405