Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Jul. 31, 2011
Current Assets
Cash and cash equivalents	$ 12,680	$ 18,399
Accounts receivable, net of allowance for doubtful accounts of $319 and $282, respectively	11,796	11,148
Inventories	15,679	12,082
Prepaid expenses	825	961
Deferred income taxes	1,247	792
Assets held for sale	0	868
Total current assets	42,227	44,250
Property and equipment, net	9,239	8,561
Intangible and other assets
Goodwill	10,660	10,660
Other intangible assets, net	11,277	11,792
Deferred income taxes	4,088	4,915
Patents, net	1,179	1,050
Cash value of life insurance	93	82
Total assets	78,763	81,310
Current Liabilities
Current maturities of long-term debt	0	1,053
Accounts payable	2,144	1,567
Accrued expenses	2,844	3,193
Income taxes payable	191	6,233
Deferred revenue	1,288	540
Total current liabilities	6,467	12,586
Long-Term Liabilities
Deferred revenue	15,818	18,060
Total long-term liabilities	15,818	18,060
Total liabilities	22,285	30,646
Commitments and contingencies (Note 8 and 15)
Stockholders' Equity
Common stock at July 31, 2012 and July 31, 2011, $0.001 par value, 50,000,000 shares authorized; 25,160,069 and 24,970,884 shares issued and outstanding, respectively	25	25
Additional paid-in capital	26,421	25,598
Retained earnings	30,538	24,952
Accumulated other comprehensive income (loss):
Foreign currency translation adjustment	(506)	89
Total stockholders' equity	56,478	50,664
Total liabilities and stockholders' equity	$ 78,763	$ 81,310