SEGMENT INFORMATION - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Segment Reporting Information [Line Items]
Revenues	$ 50,775	$ 56,237	$ 155,583	$ 166,662
Pre-tax income (loss)	1,220	1,413	(1,349)	(5,028)
Assets	70,476	67,902	70,476	67,902	$ 68,449
Depreciation and amortization	461	387	1,320	1,145
Interest	8	25	26	30
Capital expenditures	1,376	572	2,376	622
Corporate
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Pre-tax income (loss)	(820)	(940)	(4,211)	(13,571)
Assets	14,662	10,233	14,662	10,233
Depreciation and amortization	117	134	374	404
Interest	0	0	0	0
Capital expenditures	909	61	1,666	61
Brokerage and Advisory Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues	48,100	53,792	148,011	159,827
Pre-tax income (loss)	1,610	1,912	1,359	7,154
Assets	50,470	52,928	50,470	52,928
Depreciation and amortization	207	182	605	549
Interest	8	25	26	30
Capital expenditures	461	511	633	555
Tax and Accounting Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,675	2,445	7,572	6,835
Pre-tax income (loss)	430	441	1,503	1,389
Assets	5,344	4,741	5,344	4,741
Depreciation and amortization	137	71	341	192
Interest	0	0	0	0
Capital expenditures	$ 6	$ 0	$ 77	$ 6