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Long-Term Debt - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Feb. 20, 2018	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2020	Aug. 01, 2019	Jul. 31, 2019
Debt Instrument [Line Items]
Principal amount including interest paid in kind		$ 180,900,000
Long-term debt, net of debt discount		$ 1,016,000			$ 1,094,000
Debt maturity date		Dec. 31, 2023
Loan Agreement
Debt Instrument [Line Items]
Percentage of fee payable upon partial prepayment or maturity						4.00%	3.00%
Percentage of capital stock of subsidiaries subject to certain exception	65.00%
Debt instrument, covenant daily minimum combined cash and investment balance	$ 15,000,000.0
Interest expense related to initial term loan		$ 4,700,000	$ 4,700,000
CRG Servicing LLC
Debt Instrument [Line Items]
Maximum borrowing capacity	175,000,000.0
Net proceeds from the initial term loan	$ 173,300,000
Debt interest rate	9.50%
Debt instrument interest rate, effective percentage				10.30%
Principal amount including interest paid in kind		$ 5,900,000		$ 180,900,000
Long-term debt, net of debt discount				$ 1,000,000.0
Debt maturity date	Dec. 31, 2023			Dec. 31, 2023

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