Amount of deferred tax benefit attributable to unrecognized share-based compensation.

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The number of shares subject to option or award in a single fiscal year as outlined in the plan contract.

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The percentage of the total number of shares subject to options or awards granted in a single fiscal year; this will take effect only if the percentage is less than a specified amount in the plan contract.

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Aggregate dividends paid during the period for each share of special common stock outstanding.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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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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Net number of share options (or share units) granted during the period.

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

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stock Based Compensation (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 45,271	$ 40,504	$ 92,447	$ 77,876
Deferred tax benefit related to stock based compensation	2,483	$ 2,246	5,061	$ 4,280
Unrecognized compensation costs	244,525		$ 244,525
Period in which compensation cost will be recognized			2 years
Deferred tax benefit related to unrecognized compensation costs	$ 14,059		$ 14,059
Granted			54,025
Outstanding	295,587		295,587		259,164
Cash divided paid	$ 0.25	$ 0.25	$ 0.50	$ 1.50
Special cash divided paid				$ 1.00
Total intrinsic values of the options exercised			$ 263	$ 64,420
2017 Plan [Member] \| Non employee directors [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized shares under plan	133,000		133,000
Percentage of total number of shares subject to options or awards, single fiscal year			33.33%
Number of shares subject to option or award, single fiscal year	13,300		13,300
2017 Plan [Member] \| Individual Employee [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares subject to option or award, single fiscal year	15,000		15,000
Stock Option Plans [Member] \| 2017 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			2 years
Expiration period			10 years
Authorized shares under plan	400,000		400,000
Granted			164,329
Stock Option Plans [Member] \| 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding	146,550		146,550