Capital Requirements (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Assets	$ 21,549,000	$ 18,177,000
Cash and cash equivalents	3,767,000	7,229,000	$ 5,384,000	$ 3,765,000
MSCO [Member]
Net capital	5,100,000	8,900,000
Minimum net capital required	250,000	250,000
Net capital in excess of minimum requirement	$ 4,800,000	$ 8,700,000