Income Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Taxes [Abstract]
(Provision) benefit from income taxes	$ (34,000)	$ 146,000
Deferred income taxes (Note 7)	$ 661,000		$ 652,000
Additional percentage of interest in partnership	50.00%
Unrecognized tax benefits	$ 835,000		763,000
Unrecognized tax benefits that would impact effective tax rate	278,000		278,000
Unrecognized tax benefits that would not impact effective tax rate	556,000		485,000
Interest and penalties	$ 246,000		$ 241,000