BROKER DEALERS (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2018 USD ($) subsidiary	Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items]
Number of broker-dealer subsidiaries (in subsidiary) | subsidiary	2
SpeedRoute
Related Party Transaction [Line Items]
Actual net capital	$ 451,585	$ 334,848
Amount in excess of required net capital	345,100	233,485
Minimum required net capital	$ 106,485	$ 101,363
Net capital ratio (as a percent)	3.54	4.50
Pro Securities
Related Party Transaction [Line Items]
Actual net capital	$ 105,101	$ 24,175
Amount in excess of required net capital	100,101	19,175
Minimum required net capital	$ 5,000	$ 5,000
Net capital ratio (as a percent)	0.16	1.30