CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($)	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Net sales
Product sales	$ 166,901,000	$ 133,806,000
Product service	20,824,000	19,973,000
Total net sales	187,725,000	153,779,000
Cost of sales
Product sales	83,616,000	69,141,000
Product service	14,602,000	13,440,000
Total cost of sales	98,218,000	82,581,000
Gross profit	89,507,000	71,198,000
Expenses:
Selling	27,893,000	21,460,000
General and administrative	30,003,000	22,197,000
Research and development	4,548,000	3,765,000
Total operating expenses	62,444,000	47,422,000
Income from operations	27,063,000	23,776,000
Interest expense	1,112,000	766,000
Interest income	(19,000)	(21,000)
Income before income taxes	25,970,000	23,031,000
Income taxes	7,170,000	8,777,000
Net income	$ 18,800,000	$ 14,254,000
Earnings per common share:
Basic (in dollars per share)	$ 0.45	$ 0.34
Diluted (in dollars per share)	0.45	0.34
Dividends per common share (in dollars per share)	$ 0.07	$ 0.06