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Revenue (Tables) | 12 Months Ended
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Jun. 30, 2022
Revenue |
Schedule of revenue by product group |
|  | Year Ended June 30, |
|  | 2022 |  |  | 2021 |
PMO |  | $ | 15,020,542 |  |  | $ | 15,882,189 |
Infrared Products |  |  | 18,735,325 |  |  |  | 20,971,080 |
Specialty Products |  |  | 1,803,293 |  |  |  | 1,611,552 |
Total revenue |  | $ | 35,559,160 |  |  | $ | 38,464,821 |

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