Capital Requirements (Narrative) (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Assets	$ 28,473,000	$ 18,177,000
Cash and cash equivalents	3,082,000	7,229,000
MSCO [Member]
Net capital	4,400,000	8,900,000
Minimum net capital required	250,000	250,000
Net capital in excess of minimum requirement	4,200,000	$ 8,700,000
Weeden Prime Services LLC [Member]
Net capital	3,900,000
Minimum net capital required	250,000
Net capital in excess of minimum requirement	$ 3,700,000