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Product Warranties
 9 Months Ended
Jul. 31, 2013
Product Warranties Disclosures [Abstract]  
Product Warranties
Product Warranties
As of July 31, 2013 and October 31, 2012, the Company’s accrual for estimated product warranty claims totaled $200,000 and $250,000, respectively, and is included in accounts payable and accrued expenses. Warranty claims expense for the three months and nine months ended July 31, 2013 totaled $80,085 and $161,725, respectively, and warranty claims expense for the three months and nine months ended July 31, 2012 totaled $121,076 and $155,592, respectively.
 
The following table summarizes the changes in the Company’s accrual for product warranties during the nine months ended July 31, 2013 and 2012:
 
 
Nine Months Ended
July 31,
 
 
2013
 
2012
Balance at beginning of period
 
$
250,000

 
$
175,000

Liabilities accrued for warranties issued during the period
 
319,638

 
218,454

Warranty claims and costs paid during the period
 
(211,725
)
 
(140,592
)
Changes in liability for pre-existing warranties during the period
 
(157,913
)
 
(62,862
)
Balance at end of period
 
$
200,000

 
$
190,000