Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Taxes [Abstract]
(Provision) benefit from income taxes	$ (8,000)	$ 10,000	$ 136,000	$ 187,000
Deferred income taxes (Note 7)	649,000		649,000		$ 621,000
Unrecognized tax benefits	514,000		514,000		673,000
Interest and penalties	$ 235,000		$ 235,000		$ 304,000