Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Feb. 13, 2019
Paycheck Protection Program Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of loan	$ 2.0	$ 2.0
Fair value of loan	2.0	2.0
CRG Servicing LLC [Member] | Senior Secured Term Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of loan	38.4	38.3
long-term debt	36.1	36.0
Exit fee accrued			$ 2.1
Fair value of loan	38.2	38.0
CRG Servicing LLC [Member] | Other Long-term Liabilities [Member] | Senior Secured Term Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exit fee accrued	$ 2.3	$ 2.3