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

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- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

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- Definition

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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Amount of the required periodic payments including both interest and principal payments.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Debt instrument maturity or due date month and year.

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Long-Term Debt - Notes Payable to BMI - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Repayment of note payable		$ 58.5	$ 11.2	$ 12.6
BMI \| Bank note payable \| Meadows Bank
Debt Instrument [Line Items]
Repayment of note payable	$ 8.5
BMI \| 2017 Bank Loan \| Bank note payable \| Western Alliance Bank
Debt Instrument [Line Items]
Principal amount of loan agreement	20.5
Frequency of debt instrument payment		semi-annual
Debt instrument, payment terms		The agreement requires semi-annual payments of principal and interest on June 1 and December 1 aggregating $1.9 million annually beginning on June 1, 2017 through the maturity date in June 2032.
Periodic principal and interest payments	$ 1.9
Loans maturity period	2032-06
Interest rate	5.34%
Debt issuance cost		$ 0.6