Brokerage And Custodial Fees (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2018

Dec. 31, 2017

Brokerage And Custodial Fees [Abstract]

Schedule Of Brokerage And Custodial Fees

	Three months ending September 30,		Nine months ending September 30,
	2018	2017	2018	2017
Brokerage fees	$             2,415,223	$             3,037,123	$             7,668,787	$             9,446,315
Custodial fees	-	4	-	18
Total	$             2,415,223	$             3,037,127	$             7,668,787	$             9,446,333

	2017	2016	2015
Brokerage fees	$           12,462,234	$           13,188,941	$           13,566,607
Custodial fees	18	46	131
Total	$           12,462,252	$           13,188,987	$           13,566,738

Schedule Of Brokerage Fee Rebates

	Three months ending September 30,		Nine months ending September 30,
	2018	2017	2018	2017
Brokerage fee rebates	$                145,300	$                178,041	$                486,810	$                565,192