Goodwill And Intangible Assets (Schedule of Changes in Carrying Amount of Goodwill) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 31, 2021	Nov. 03, 2020	May 14, 2020
Goodwill [Roll Forward]
January 1, 2020
Acquisition	2,086,000
Ending Balance	2,086,393
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Gross goodwill		$ 2,086,000
Accumulated impairment loss
Balance at March 31, 2021	2,086,393	2,086,393
Ecessa Corporation [Member]
Goodwill [Roll Forward]
January 1, 2020
Acquisition	1,341,000
Ending Balance	1,341,000
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Gross goodwill		1,341,000
Accumulated impairment loss
Balance at March 31, 2021	1,341,000	1,341,000		$ 1,341,000
IVDesk Minnesota, Inc. [Member]
Goodwill [Roll Forward]
January 1, 2020
Acquisition	745,000
Ending Balance	745,000
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Gross goodwill		745,000
Accumulated impairment loss
Balance at March 31, 2021	$ 745,000	$ 745,000	$ 745,000