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Long-Term Debt (3.95% Promissory Note) - Additional Information (Detail) - 3.95% Promissory Note [Member] - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Feb. 29, 2020	Sep. 30, 2020
Debt Instrument [Line Items]
Debt instrument stated interest rate	3.95%	3.95%
Repayment of debt		In February 2020, the Company repaid its 3.95% Promissory Note for $8,891 including principal and unpaid interest payable at maturity date
Repayments of debt	$ 8,891

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- Definition

Description of repayment of debt at maturity.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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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.

+ References

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

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