GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Sep. 30, 2020

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
Additions	1,200
Impairment	(38,333		)
September 30, 2020	$	45,653

Intangible Assets Arising from Business Acquisitions

Intangible assets consisted of the following:

		September 30, 2020						September 30, 2019
(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	$	16,222	$	72,874	$	89,096	$	10,256	$	78,840
Intellectual property	13 years	1,500		103		1,397		—		—		—
Trade name	20 years	5,865		842		5,023		5,865		522		5,343
Customer relationships	5 years	4,000		2,267		1,733		4,000		1,467		2,533
		$	100,461	$	19,434	$	81,027	$	98,961	$	12,245	$	86,716