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Stock-based Compensation and Equity Transactions - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2012
Jul. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted during period     78,500  
Weighted average fair value of stock options under Black-Scholes pricing model     $ 1.23 $ 1.08
Issuance of common stock for exercise of stock option     103,788  
Proceeds from exercise of stock options     $ 141,340 $ 814,697
Weighted average remaining life of options outstanding     3 years 314 days  
Weighted average remaining contractual life of options exercisable     3 years 223 days  
Weighted average life of options vested and expected to vest     3 years 223 days  
Aggregate intrinsic value of options outstanding 3,825,552   3,825,552  
Aggregate intrinsic value of options exercisable 3,108,978   3,108,978  
Aggregate intrinsic value of options vested and expected to vest 8,242,985   8,242,985  
Non-vested stock-based arrangements yet to be recognized 372,301   372,301  
Stock based arrangements yet to be recognized, weighted average period expected to be recognized     3 years 266 days  
Stock-based compensation expense 43,413 23,000 163,804 165,368
Nonqualified Stock Options | Board of Directors
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted during period     27,000  
Stock options, expiration period     5 years  
Qualified Stock Options | Vice President of Marketing
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted during period     50,000  
Qualified Stock Options | Employee
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted during period     1,500  
Cost of Sales
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense     41,627 30,547
Selling and general expenses
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense     $ 122,177 $ 134,821