Acquisitions (Details)	3 Months Ended		6 Months Ended				0 Months Ended		0 Months Ended	2 Months Ended	3 Months Ended	6 Months Ended		6 Months Ended
	Jan. 31, 2015 USD ($)	Jan. 31, 2014 USD ($)	Jan. 31, 2015 USD ($)	Jan. 31, 2014 USD ($)	Dec. 10, 2014 USD ($)	Jul. 31, 2014 USD ($)	May 03, 2014 Ophthalmology Manufacturing Company [Member] USD ($)	May 03, 2014 Ophthalmology Manufacturing Company [Member] USD ($)	Dec. 10, 2014 Sterimedix [Member] USD ($)	Jan. 31, 2015 Sterimedix [Member] USD ($)	Jan. 31, 2015 Sterimedix [Member] USD ($)	Jan. 31, 2015 Sterimedix [Member] USD ($)	Dec. 10, 2014 Sterimedix [Member] USD ($)	Jan. 31, 2015 Sterimedix [Member] 2015 [Member] GBP (£)	Jan. 31, 2015 Sterimedix [Member] 2016 [Member] GBP (£)	Jan. 31, 2015 Sterimedix [Member] 2017 [Member] GBP (£)
Business Acquisition [Line Items]
Cash consideration			$ 13,177,000	$ 0			$ 1,400,000		$ 13,200,000
Intellectual property								800,000					0
Goodwill	17,429,000		17,429,000		5,000,000	12,738,000		400,000					0
Acquisition date												Dec. 10, 2014
Earn-out payments to sellers based on the gross profit agreement terms, period												January 1, 2015 until December 31, 2017
Earn-out payments to sellers based on the gross profit agreement terms, threshold gross profit amount														3,190,000	3,767,500	4,400,000
Earn-out payments to sellers based on the gross profit agreement terms, percentage														136.70%	136.70%	136.70%
Contingent payment obligation					2,651,000								0
Net sales										1,100,000
Net income	952,000	(225,000)	1,720,000	709,000						42,000
Acquisition related costs											204,000	290,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Accounts receivable					706,000
Inventory					1,617,000
Other current assets					128,000
Long-lived assets					1,946,000
Intangible Assets					8,467,000
Goodwill	17,429,000		17,429,000		5,000,000	12,738,000		400,000					0
Total assets					17,864,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Deferred tax liabilities					1,226,000
Current liabilities assumed					810,000
Contingent acquisition liability					2,651,000								0
Total liabilities					4,687,000
Net assets acquired					13,177,000
Business Acquisition, Pro Forma Information [Abstract]
Net Sales	18,875,000	16,787,000	37,427,000	33,924,000
Net Income (Loss)	$ 1,110,000	$ (166,000)	$ 2,028,000	$ 791,000
Average shares outstanding - basic (in shares)	25,364,574	25,309,641	25,352,279	25,301,830
Average shares outstanding - diluted (in shares)	25,424,835	25,309,641	25,407,508	25,386,679
Basic earnings per share (in dollars per share)	$ 0.04	$ (0.01)	$ 0.08	$ 0.03
Diluted earnings per share (in dollars per share)	$ 0.04	$ (0.01)	$ 0.08	$ 0.03