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Subsequent Events - Additional Information (Detail) - Corporate Aircraft [Member] - USD ($) $ in Millions		12 Months Ended
	Jan. 19, 2021	Dec. 31, 2020	Sep. 30, 2020
Subsequent Event [Line Items]
Debt instrument, face amount			$ 6.8
Term Loan [Member] | PNC Equipment Finance, LLC [Member]
Subsequent Event [Line Items]
Debt instrument, description		The loan is payable in 119 equal monthly installments, commencing on March 1, 2021 with a final payment of any outstanding principal and accrued interest due and payable on the final monthly payment date.
Subsequent Event [Member] | Term Loan [Member] | PNC Equipment Finance, LLC [Member]
Subsequent Event [Line Items]
Debt instrument, face amount	$ 20.5
Debt instrument, payment terms	120 months
Debt instrument, fixed interest rate	2.744%
Debt instrument, frequency of periodic payment	The loan is payable in 119 equal monthly installments
Debt instrument, date of first required payment	Mar. 01, 2021

X

- Definition

Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

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- Definition

Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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No definition available.

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