Goodwill and intangible assets (Tables)

6 Months Ended

Jan. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Indefinite-Lived Intangible Assets

	Gross		Accumulated Amortization			Net
July 31, 2020	$	27,686	$	(27,148	)	$	538
Amortization expense		-		(151	)		(151	)
Foreign currency translation		168		(162	)		6
January 31, 2021	$	27,854	$	(27,461	)	$	393

Schedule of Intangible Assets

	January 31, 2021							July 31, 2020
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Patents	$	11,027	$	(11,023	)	$	4	$	11,027		(11,014	)	$	13
Customer relationships		12,095		(11,706	)		389		12,003		(11,478	)		525
Website and acquired content		1,028		(1,028	)		-		1,022		(1,022	)		-
Licensed technology and other		492		(492	)		-		483		(483	)		-
Trademarks		3,212		(3,212	)		-		3,151		(3,151	)		-
Total	$	27,854	$	(27,461	)	$	393	$	27,686		(27,148	)	$	538

Schedule of Useful Lives For Acquisitions

At January 31, 2021, information with respect to acquired intangibles is as follows:	Useful life assigned	Weighted average remaining useful life
Customer relationships	8 -15 years	1 year