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Stock-Based Compensation (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Stock option activity and related information
Number of options outstanding at June 30, 2020	53,700
Number of options granted	0
Number of options exercised	(34,150)	0	(12,500)
Number of options cancelled	0
Number of options outstanding at June 30, 2021	19,550	53,700
Number of options vested or expected to vest at June 30, 2021	19,550
Number of options exercisable at June 30, 2021	19,550
Weighted average remaining contractual life	4 months 24 days	1 year 4 months 24 days
Weighted average remaining contractual life vested or expected to vest at June 30, 2021	4 months 24 days
Weighted average remaining contractual life exercisable at June 30, 2021	4 months 24 days
Weighted average exercise price at June 30, 2020	$ 10.19
Weighted average exercise price granted	0
Weighted average exercise price exercised	10.19
Weighted average exercise price cancelled	0
Weighted average exercise price at June 30, 2021	10.19	$ 10.19
Weighted average exercise price vested or expected to vest at June 30, 2021	10.19
Weighted average exercise price exercisable at June 30, 2021	$ 10.19
Aggregate intrinsic value outstanding at June 30, 2020	$ 6,000	$ 0
Aggregate intrinsic value exercised	82,000		$ 100,000
Aggregate intrinsic value outstanding at June 30, 2021	6,000	$ 0
Aggregate intrinsic value vested or expected to be vest at June 30, 2021	6,000
Aggregate intrinsic value exercisable at June 30, 2021	$ 6,000

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Number of options outstanding, including both vested and non-vested options.

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