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Warranty | 12 Months Ended
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Sep. 30, 2022
Warranty |
Warranty | 9. Warranty ​ The Company provides for the estimated cost of product warranties at the time revenue is recognized. Warranty cost is recorded as cost of sales and the reserve balance is recorded as an accrued expense in the financial statements. While the Company engages in extensive product quality programs and processes, the Company’s warranty obligation is affected by product failure rates and by the related material, labor, and delivery costs incurred in correcting a product failure. If actual product failure rates, material, or labor costs differ from the Company’s estimates, further revisions to the estimated warranty liability would be recorded. ​ Warranty cost and accrual information for fiscal years ended September 30, 2022 and 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
Warranty accrual as of October 1, | ​ | $ | 589,260 | ​ | $ | 547,743
Expense accrual for fiscal year | ​ |  | 152,419 | ​ |  | 176,028
Warranty cost incurred for fiscal year | ​ |  | (134,678) | ​ |  | (134,511)
Warranty accrual as of September 30, | ​ | $ | 607,001 | ​ | $ | 589,260
​

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -URI https://asc.fasb.org/topic&trid=2155896 + Details
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