401 (k) Plan - Additional Information (Details)	9 Months Ended
	Sep. 30, 2020 USD ($)
Compensation And Retirement Disclosure [Abstract]
Defined contribution plan, description	The Company maintains a defined contribution 401(k) plan available to eligible employees. Employee contributions are voluntary and are determined on an individual basis, limited to the maximum amount allowable under federal tax regulations. The Company, at its discretion, may make certain matching contributions to the 401(k) plan.
Defined contribution plan, plan name [Extensible List]	mtcr:Plan401KMember
Contributions to plan made by company	$ 0