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Employee Benefit Plans - Summary of Amounts Expected to be Recognized in Net Periodic Cost in Coming Year (Detail)	Dec. 31, 2020 USD ($)
Supplemental Employee Retirement Plan [Member]
Amounts Expected to be Recognized in Net Periodic Cost in the Coming Year
(Gain) loss recognition	$ 143,362

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- References

No definition available.

+ Details

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- Definition

Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (s)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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