Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 0	$ 0	$ 0	$ 0
Federal tax expense (benefit)	0	0	0	0
State tax expense (benefit)	0	$ 0	0	$ 0
Deferred income tax valuation allowance	8,674,000		8,674,000
Net long-term deferred income tax asset or liability	0		0
Net operating loss carry-forward	$ 19,200,000		$ 19,200,000
Net operating loss carryforward expiration year			2023 through fiscal 2038