Taxes on Income (Details) - Components of income tax expense - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ (41,000)
State and local	25,000	25,000
Foreign	9,000	16,000
Income tax (expense) benefit, current	(7,000)	41,000
Deferred:
Federal
State and local
Income tax (expense) benefit, deferred
Income tax (benefit) expense	$ (7,000)	$ 41,000