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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2021
Summary of Significant Accounting Policies |
Schedule of inventories | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | September 30,
​ | ​ | 2021 | ​ | 2020
Raw materials | ​ | $ | 3,729,692 | ​ | $ | 3,378,246
Work-in-process | ​ |  | 629,814 | ​ |  | 656,382
Finished goods | ​ |  | 185,886 | ​ |  | 256,707
​ | ​ | $ | 4,545,392 | ​ | $ | 4,291,335
Summary of contract assets and contract liabilities balances | ​
​ | ​ | ​ | ​
​ |  | Contract
​ | ​ | Liabilities
September 30, 2020 |  | $ | 313,365
Performance obligations satisfied during the period that were included in the contract liability balance at the beginning of the period |  | ​ | (305,494)
Increases due to invoicing prior to satisfaction of performance obligations |  | ​ | 409,633
September 30, 2021 | ​ | $ | 417,504
Schedule of customer service revenue and cost of sales | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Fiscal Year Ended September 30,
​ |  | 2021 |  | 2020 |  | 2019
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Customer Service Sales | ​ | $ | 4,034,294 | ​ | $ | 4,265,086 | ​ | $ | 3,553,919
Customer Service Cost of Sales | ​ | ​ | 1,489,942 | ​ | ​ | 1,457,995 | ​ | ​ | 1,374,227
Gross Profit | ​ | $ | 2,544,352 | ​ | $ | 2,807,091 | ​ | $ | 2,179,692
Schedule of financial assets and liabilities accounted for at fair value on a recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement on September 30, 2021
​ |  | Quoted Price in |  | Significant Other |  | Significant
​ | ​ | Active Markets for | ​ | Observable | ​ | Unobservable
​ | ​ | Identical Assets | ​ | Inputs | ​ | Inputs
​ | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3)
Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds | ​ | $ | 6,051,902 | ​ | $ | — | ​ | $ | —
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement on September 30, 2020
​ |  | Quoted Price in |  | Significant Other |  | Significant
​ | ​ | Active Markets for | ​ | Observable | ​ | Unobservable
​ | ​ | Identical Assets | ​ | Inputs | ​ | Inputs
​ | ​ | (Level 1) | ​ | (Level 2) | ​ | (Level 3)
Assets | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market funds | ​ | $ | 11,607,293 | ​ | $ | — | ​ | $ | —

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