Revenue Recognition (Tables)

12 Months Ended

Jul. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of net sales disaggregated by geography and product line

The following table gives information as to the net sales disaggregated by geography and product line:

	Year Ended July 31,
Net sales by geography	2020		2019		2018(1)
United States	$	742,410	$	665,661	$	643,744
Europe/Africa/Middle East	167,360		148,334		131,130
Asia/Pacific	73,517		66,228		57,108
Canada	27,417		32,152		33,524
Latin America/South America	5,344		5,780		6,416
Total	$	1,016,048	$	918,155	$	871,922
Net sales by product line
Capital equipment	$	213,723	$	221,668	$	240,153
Consumables	570,710		569,412		523,073
Product service	123,771		122,752		106,764
Instrument	104,440		—		—
All other(2)	3,404		4,323		1,932
Total	$	1,016,048	$	918,155	$	871,922

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(1)As noted above, fiscal year 2018 amounts have not been adjusted under the modified retrospective method.

(2)Primarily includes software licensing revenues.

Schedule of contract liabilities activity

A summary of contract liabilities activity for the year ended July 31, 2020 follows:

	Contract Liabilities
Balance, August 1, 2018	$	29,015
Revenue deferred in current year	61,996
Deferred revenue recognized	(61,913)
Foreign currency translation	(863)
Balance, July 31, 2019	28,235
Revenue deferred in current year	58,221
Deferred revenue recognized	(60,229)
Foreign currency translation	293
Balance, July 31, 2020	26,520
Contract liabilities included in Other long-term liabilities	(297)
Deferred revenue	$	26,223