Taxes on Income (Details) - Significant components of the Company`s deferred income tax assets and liabilities (Incomplete) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Apr. 10, 2019	Jun. 26, 2012
Deferred income tax asset:
Tax credit carryforwards
Operating loss carryforwards	2,763,000	1,487,000	$ 3,000,000	$ 5,900,000
Net pension costs	2,157,000	2,210,000
Allowance for bad debts	179,000	182,000
Other	6,000	148,000
Valuation allowance	(4,801,000)	(3,563,000)
Deferred income tax asset, Total	304,000	464,000
Deferred income tax liability:
Depreciation	128,000	345,000
Other	176,000	119,000
Deferred income tax liability, Total	304,000	464,000
Net deferred income taxes