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Stock Purchase - Additional Information (Detail) - USD ($)	1 Months Ended	6 Months Ended
	Dec. 31, 2018	Nov. 30, 2018	Oct. 31, 2018
Stock Repurchase Program [Line Items]
Shares authorized to purchase			3,000,000
Number of shares repurchased		0
During Fiscal 2019
Stock Repurchase Program [Line Items]
Cost of repurchased shares, including commissions	$ 3,134,727
Number of shares repurchased	50,000

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Cumulative stock repurchased and retired value.

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Stock repurchase program.

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- Definition

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

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