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Note 8 - Product Warranty | 12 Months Ended
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Nov. 30, 2012
Product Warranty Disclosure [Text Block] | (8) Product Warranty The Company offers warranties of various lengths to its customers depending on the specific product and terms of the customer purchase agreement. The average length of the warranty period is 1 year from date of purchase. The Company’s warranties require it to repair or replace defective products during the warranty period at no cost to the customer. The Company records a liability for estimated costs that may be incurred under its warranties. The costs are estimated based on historical experience and any specific warranty issues that have been identified. Although historical warranty costs have been within expectations, there can be no assurance that future warranty costs will not exceed historical amounts. The Company periodically assesses the adequacy of its recorded warranty liability and adjusts the balance as necessary. Changes in the Company’s product warranty liability included in “accrued expenses” for the years ended November 30, 2012 and 2011 are as follows:
|  | November 30, 2012 |  |  | November 30, 2011 |
Balance, beginning |  | $ | 201,630 |  |  | $ | 180,549 |
Settlements made in cash or in-kind |  |  | (436,096 | ) |  |  | (481,539 | )
Warranties issued |  |  | 813,330 |  |  |  | 502,620 |
Balance, ending |  | $ | 578,864 |  |  | $ | 201,630 |

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- Definition The entire disclosure for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 45 -Paragraph 14 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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Period Type: | duration