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Treasury Stock - Additional Information (Details) - USD ($)	1 Months Ended		6 Months Ended	22 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2021
Equity Class Of Treasury Stock [Line Items]
Stock repurchase, shares			0	162,000
Common stock repurchase, value			$ 1,600,000	$ 1,600,000
Common Stock | Share Repurchase Program September 9, 2019
Equity Class Of Treasury Stock [Line Items]
Period of stock repurchase program		12 months
Additional period of stock repurchase program	12 months
Common Stock | Share Repurchase Program September 9, 2019 | Maximum
Equity Class Of Treasury Stock [Line Items]
Stock approved for repurchase, value		$ 7,000,000.0

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Amount allocated to previously issued common shares repurchased by the issuing entity and held in treasury.

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Number of shares that have been repurchased during the period and are being held in treasury.

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