Income Taxes - Net Deferred Income Tax Assets (Detail) - USD ($)	Jun. 30, 2021	Jun. 30, 2020
Deferred Tax Assets Net [Abstract]
Net operating loss carryforward	$ 5,856,000	$ 6,078,000
Depreciation expense	(98,000)	(86,000)
Allowances for receivables	117,000	131,000
Accrued liabilities	268,000	1,407,000
Intangible assets	263,000	585,000
Pension liabilities	113,000	165,000
Other	181,000	109,000
Gross deferred tax assets	6,700,000	8,389,000
Less valuation allowance	(6,700,000)	(8,389,000)
Net deferred income tax assets	$ 0	$ 0