Annual report pursuant to Section 13 and 15(d)

Segment reporting (Detail) - Geographic financial information

v2.4.0.6
Segment reporting (Detail) - Geographic financial information (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2010
Net sales to unaffiliated customers $ 103,083 $ 102,029 $ 97,082
Long-lived assets 28,348 57,693 57,169
United States [Member]
     
Net sales to unaffiliated customers 87,776 85,691 82,873
Long-lived assets 25,081 44,028 45,439
Switzerland [Member]
     
Net sales to unaffiliated customers 6,802 8,508 7,037
Long-lived assets 2,223 8,958 7,063
United Kingdom [Member]
     
Net sales to unaffiliated customers 2,728 2,825 2,507
Long-lived assets 618 2,857 2,944
Other International Countries [Member]
     
Net sales to unaffiliated customers 5,777 5,005 4,665
Long-lived assets $ 426 $ 1,850 $ 1,723