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Stock Repurchases - Additional Information (Detail) - USD ($)	1 Months Ended
	Dec. 31, 2018	May 31, 2020	Oct. 31, 2018
Stock Repurchase Program [Line Items]
Shares authorized to purchase			3,000,000
Cost of repurchased shares, including commissions	$ 3,134,727
Number of shares repurchased	50,000
Stock remained available for repurchase		2,950,000

X

- Definition

Cumulative stock repurchased and retired value.

+ References

No definition available.

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- Definition

Stock repurchase program.

+ References

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X

- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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X

- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 210
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