Long-Term Debt (3.95% Promissory Note) - Additional Information (Detail) - 3.95% Promissory Note [Member]	6 Months Ended
Jun. 30, 2020	Feb. 29, 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

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

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=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant