Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Percentage of NOL under tax cuts and jobs act	80.00%
Addition to taxable income	$ 7,303,000
Refundable AMT credits	305,000
Deferred income tax valuation allowance	8,389,000	$ 8,625,000
Net long-term deferred income tax asset or liability	0	$ 0
Net operating loss carry-forward	$ 17,500,000
Net operating loss carryforward expiration year	2023 through fiscal 2038