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Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans - Schedule of Stock Options by Exercise Price (Details) - $ / shares	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	$ 1.85	$ 1.85
Exercise price upper range	$ 7.50	$ 8.35
Number outstanding	275,000
Options Outstanding Weighted- Average Remaining Contractual Life	3 years 8 months 12 days
Weighted average exercise price	$ 5.25
Number exercisable	269,000
Options exercisable weighted average exercise price	$ 5.29
$1.85 – $3.55
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	1.85
Exercise price upper range	$ 3.55
Number outstanding	76,000
Options Outstanding Weighted- Average Remaining Contractual Life	1 year 9 months 18 days
Weighted average exercise price	$ 3.35
Number exercisable	70,000
Options exercisable weighted average exercise price	$ 3.35
$5.30 – $5.85
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	5.30
Exercise price upper range	$ 5.85
Number outstanding	113,000
Options Outstanding Weighted- Average Remaining Contractual Life	5 years 10 months 24 days
Weighted average exercise price	$ 5.49
Number exercisable	113,000
Options exercisable weighted average exercise price	$ 5.49
$6.00 – $7.50
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range	6.00
Exercise price upper range	$ 7.50
Number outstanding	86,000
Options Outstanding Weighted- Average Remaining Contractual Life	2 years 6 months
Weighted average exercise price	$ 6.59
Number exercisable	86,000
Options exercisable weighted average exercise price	$ 6.59

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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