Income Taxes (Significant Valuation Allowances) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Tax Credit Carryforward [Line Items]
Valuation allowance	$ 16,486	$ 16,946
United States
Tax Credit Carryforward [Line Items]
Valuation allowance	13,900	14,900
Domestic Tax Authority | United States
Tax Credit Carryforward [Line Items]
Valuation allowance	4,233	5,816
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Valuation allowance	600	700
State and Local Jurisdiction | United States
Tax Credit Carryforward [Line Items]
Valuation allowance	9,648	9,090
Capital Loss Carryforward | Israel
Tax Credit Carryforward [Line Items]
Valuation allowance	$ 1,537	$ 1,390