Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 0	$ (296,000)	$ 0	$ (296,000)
Federal tax expense (benefit)	0	(296,000)	0	(296,000)
State tax expense (benefit)	0	0	0	0
Deferred income tax valuation allowance	8,513,000		8,513,000
Net long-term deferred income tax asset or liability	0		0
Net operating loss carry-forward	$ 16,300,000		$ 16,300,000
Net operating loss carryforward expiration year			2023 through fiscal 2038
Discrete net tax benefit					$ 0
Federal tax rate percentage			21.00%
Net tax benefit due to valuation allowance position			$ 0
Provisional estimate			$ 0
Federal alternative minimum tax, tax credits		$ 296,000		$ 296,000
Tax Cuts and Jobs Act, Accounting Complete			true