Accumulated Other Comprehensive Loss - Changes in accumulated other comprehensive loss (Details) - USD ($)	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCES	$ 23,512,203	$ 24,407,575
Net current period other comprehensive (loss) income	3,225,677	(1,987,471)
BALANCES	33,123,867	23,512,203
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCES	(4,835,836)	(2,848,365)
Other comprehensive (loss) income before reclassifications, net of tax	2,817,130	(2,203,218)
Amounts reclassified from other comprehensive loss, net of tax	408,547	215,747
Net current period other comprehensive (loss) income	3,225,677	(1,987,471)
BALANCES	(1,610,159)	(4,835,836)
Available for Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCES	(651,027)	(1,010,616)
Other comprehensive (loss) income before reclassifications, net of tax	(75,243)	359,589
Amounts reclassified from other comprehensive loss, net of tax	0	0
Net current period other comprehensive (loss) income	(75,243)	359,589
BALANCES	(726,270)	(651,027)
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
BALANCES	(4,184,809)	(1,837,749)
Other comprehensive (loss) income before reclassifications, net of tax	2,892,373	(2,562,807)
Amounts reclassified from other comprehensive loss, net of tax	408,547	215,747
Net current period other comprehensive (loss) income	3,300,920	(2,347,060)
BALANCES	$ (883,889)	$ (4,184,809)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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