Customer and Geographic Information (Tables)

6 Months Ended

Jan. 31, 2018

Geographic Areas, Revenues from External Customers [Abstract]

Schedule of net sales, as a percentage, by geography and customer type

Sales by geography and customer type, as a percentage of consolidated net sales, are as follows:

	Three months ended January 31,				Six months ended January 31,
	2018		2017		2018		2017
U.S. government	31.5	%	32.1	%	32.0	%	33.7	%
Domestic	42.0	%	35.8	%	43.1	%	36.3	%
Total United States	73.5	%	67.9	%	75.1	%	70.0	%
International	26.5	%	32.1	%	24.9	%	30.0	%
Total	100.0	%	100.0	%	100.0	%	100.0	%