Taxes on Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Jun. 26, 2012
Taxes on Income (Details) [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	34.00%	34.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 1,700,000
Dividends	3,300,000
Deferred Refundable AMT Credits	777,000
Operating Loss Carryforwards	712,000		$ 295,000
Federal Income Tax Expense (Benefit), Continuing Operations	513,000
State and Local Income Tax Expense (Benefit), Continuing Operations	199,000
Income (Loss) from Continuing Operations before Income Taxes, Domestic	3,500,000	$ 600,000
Deferred Tax Assets, Operating Loss Carryforwards	$ 4,663,000	6,533,000	$ 5,900,000
Before December 22, 2017 [Member]
Taxes on Income (Details) [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
After December 22, 2017 [Member]
Taxes on Income (Details) [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
CANADA
Taxes on Income (Details) [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Foreign	$ (100,000)	$ 100,000
Domestic Tax Authority [Member]
Taxes on Income (Details) [Line Items]
Operating Loss Carryforwards	$ 16,500,000