GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Sep. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Changes in Goodwill

The following is a summary of changes in goodwill (in thousands):

September 30, 2017	$	51,705
Additions	17,791
Impairment	(4,719		)
September 30, 2018	64,777
Additions	18,009
September 30, 2019	$	82,786

Intangible Assets Arising from Business Acquisitions

Intangible assets arising from business acquisitions consisted of the following:

		September 30, 2019						September 30, 2018
(in thousands)	Weighted Average Estimated Useful Lives	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Finite-lived intangible asset:
Developed technology	15 years	$	89,096	$	10,256	$	78,840	$	70,000	$	5,589	$	64,411
Trade name	20 years	5,865		522		5,343		5,700		237		5,463
Customer relationships	5 years	4,000		1,467		2,533		4,000		667		3,333
		$	98,961	$	12,245	$	86,716	$	79,700	$	6,493	$	73,207