Common Stock (Details)	1 Months Ended		9 Months Ended
	Nov. 30, 2021 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2022 USD ($) Vote shares	Sep. 30, 2021 USD ($)	Dec. 31, 2021 shares
Common Stock
Common stock, shares authorized for issuance | shares			290,000,000		290,000,000
Preferred stock, shares authorized for issuance | shares			10,000,000		10,000,000
Number of votes per share of common stock | Vote			1
Dividends on common stock | $			$ 0
Proceeds from sale of stock | $				$ 31,989,000
Shares of common stock reserved for issuance, on an as-converted basis
Shares available for future option grants | shares			3,953,393		2,806,953
Outstanding options | shares			7,069,868		6,354,308
Shares reserved for employee stock purchase plan | shares			400,000		400,000
Total | shares			11,423,261		9,561,261
2020 Sales Agreement
Common Stock
Common stock remained available for sale | $			$ 18,900,000
2021 sales agreement
Common Stock
Common stock remained available for sale | $			$ 40,000,000.0
At-the-market offering
Common Stock
Common stock shares sold | shares			6,920,339
At-the-market offering | 2020 Sales Agreement
Common Stock
Common stock gross proceeds | $			$ 31,100,000
At-the-market offering | Cowen | 2020 Sales Agreement | Maximum
Common Stock
Potential gross proceeds | $		$ 50,000,000
At-the-market offering | Cowen | 2021 sales agreement | Maximum
Common Stock
Potential gross proceeds | $	$ 40,000,000
Stock issuance costs, as a percent of gross proceeds	3.00%