Related Parties (Narrative) (Details) - Tower Property [Member]	12 Months Ended
	Dec. 31, 2023 USD ($) $ / Square_Foot Rate shares	Dec. 31, 2022 USD ($) $ / Square_Foot	Dec. 31, 2021 USD ($) $ / Square_Foot
Percentage of Tower stock owned by the Company's Executive Officers | Rate	66.00%
Company stock owned by Tower | shares	257,680
Tower's long-term line of credit with the Bank	$ 13,500,000
Tower's line of credit, maximum borrowing amount (based on collateral)	11,000,000
Tower's maximum amount outstanding on the line of credit during period	0	$ 0	$ 0
Tower's line of credit, current balance	0	0	0
Tower's letters of credit outstanding, amount	0	0	0
Tower's line of credit facility, commitment fee amount	0	0	0
Tower's long-term construction loan	0	0	0
Rent paid to the Company by Tower	$ 82,000	$ 82,000	$ 83,000
Rent per square foot | $ / Square_Foot	17.50	17.44	17.25