Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Income Taxes [Abstract]
(Provision) benefit from income taxes	$ (2,000)	$ (20,000)	$ 144,000	$ 177,000
Deferred income taxes (Note 7)	640,000		640,000		$ 621,000
Unrecognized tax benefits	508,000		508,000		673,000
Interest and penalties	$ 229,000		$ 229,000		$ 304,000