GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF INTANGIBLE ASSETS (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Indefinite-lived Intangible Assets [Line Items]
Cost	$ 3,570
Accumulated Amortization	1,273
Net	$ 2,297	$ 2,783
Completed technologies
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period	6 years
Cost	$ 2,370
Accumulated Amortization	833
Net	$ 1,537
Customer relationships
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period	6 years
Cost	$ 970
Accumulated Amortization	341
Net	$ 629
Trade names
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period	5 years
Cost	$ 230
Accumulated Amortization	99
Net	$ 131