Customer and Geographic Information (Tables)

9 Months Ended

Apr. 30, 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 April 30,				Nine months ended April 30,
	2018		2017		2018		2017
U.S. government	37.4	%	32.0	%	34.0	%	33.1	%
Domestic	38.0	%	41.3	%	41.2	%	37.9	%
Total United States	75.4	%	73.3	%	75.2	%	71.0	%
International	24.6	%	26.7	%	24.8	%	29.0	%
Total	100.0	%	100.0	%	100.0	%	100.0	%