Stock Incentive Plans - Additional Information (Details) - USD ($)		1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Jan. 01, 2021	Mar. 31, 2018	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate proceeds from shares issued under the plan						$ 439,000	$ 446,000
Stock-based compensation			$ 3,143,000		$ 4,473,000	7,194,000	8,356,000
Total intrinsic value of options exercised						$ 600,000	$ 600,000
Weighted-average grant date fair value per share for options granted						$ 1.72	$ 7.77
Share-based Goods and Nonemployee Services Transaction, Modification of Terms, Incremental Compensation Cost				$ 400,000
Compensation cost, Total				800,000
Total compensation cost reversed				$ 100,000
2015 Stock Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option vesting period						4 years
Stock options expiration period						10 years
Number of additional shares available for future grant			0			0
2018 Incentive Award Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for issuance		3,186,205
Allowed annual percentage increase in shares authorized as percentage of outstanding shares of common stock		4.00%						4.00%
Maximum shares of common stock may be issued		20,887,347
Number of additional shares added to the plan	2,286,010
Number of shares outstanding available for future grant			1,928,593			1,928,593
2018 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for issuance		353,980
Allowed annual percentage increase in shares authorized as percentage of outstanding shares of common stock	1.00%	1.00%
Number of additional shares added to the plan	571,502
Number of shares outstanding available for future grant			1,855,013			1,855,013
Maximum shares allowed to be issued under ESPP		4,778,738
Purchase of common stock through payroll deductions expressed in percentage of fair market value						85.00%
Common stock offering period						6 months
Number of shares issued to the plan						147,871	48,792
Aggregate proceeds from shares issued under the plan						$ 400,000	$ 400,000
Stock-based compensation			$ 100,000		$ 100,000	100,000	$ 100,000
Excess of accrued right to purchase stock						25,000,000
2015 and 2018 Stock Incentive Plans
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense			$ 25,400,000			$ 25,400,000
Unrecognized compensation expense estimated to be recognized over period						2 years 7 months 6 days