Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Apr. 15, 2020
Schedule Of Income Taxes [Line Items]
Income tax expense (benefit)	$ 0	$ (226,000)	$ 0	$ (226,000)
Federal tax expense (benefit)	0	(189,000)	0	(189,000)
State tax expense (benefit)	0	$ (37,000)	0	$ (37,000)
Deferred income tax valuation allowance	8,699,000		8,699,000
Net long-term deferred income tax asset or liability	0		0
Net operating loss carry-forward	$ 19,831,000		$ 19,831,000
Net operating loss carryforward expiration year			2023 through fiscal 2038
Non-deductible expenses			$ 3,200,000
Subsequent Event [Member]
Schedule Of Income Taxes [Line Items]
Refund of alternative minimum tax credit carry-forwards					$ 153,000