Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense	$ 0	$ 0
Federal tax expense	0	0
State tax expense	0	$ 0
Addition to taxable income	247,000
Deferred income tax valuation allowance	8,367,000
Net long-term deferred income tax asset or liability	0
Net operating loss carry-forward	$ 14,631,000
Net operating loss carryforward expiration year	2023 through fiscal 2038