Stock-Based Compensation Plan - Narrative (Details) - USD ($)		3 Months Ended		9 Months Ended		21 Months Ended
	Dec. 19, 2019	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022
Stock Based Compensation Plans [Line Items]
Stock-based compensation expense		$ 200,000	$ 300,000			$ 600,000
Unamortized stock-based compensation expense for outstanding options		1,500,000		$ 1,500,000		$ 1,500,000
Weighted average vesting period				2 years 4 months 24 days
Stock Incentive Plan 2017 [Member]
Stock Based Compensation Plans [Line Items]
Increase in number of shares reserved for grant	600,000
Number of shares reserved for grant and issuance	660,000
Expiration period (in years)				10 years
Research and Development Expense [Member]
Stock Based Compensation Plans [Line Items]
Stock-based compensation expense		49,000	46,000	$ 100,000	$ 100,000
General and Administrative Expense [Member]
Stock Based Compensation Plans [Line Items]
Stock-based compensation expense		$ 200,000	$ 200,000	$ 500,000	$ 500,000