Income Taxes - Net Deferred Income Tax Assets (Detail) - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Deferred Tax Assets Net [Abstract]
Net operating loss carryforward	$ 6,078,000	$ 6,766,000
Depreciation expense	(86,000)	46,000
Allowances for receivables	131,000	125,000
Accrued liabilities	1,407,000	603,000
Intangible assets	585,000	877,000
Pension liabilities	165,000	141,000
Other	109,000	67,000
Gross deferred tax assets	8,389,000	8,625,000
Less valuation allowance	(8,389,000)	(8,625,000)
Net deferred income tax assets	$ 0	$ 0