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Revenue Recognition and Contracts with Customers (Tables) | 12 Months Ended
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Jun. 30, 2022
Revenue Recognition and Contracts with Customers |
Schedule of disaggregation of revenues | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fiscal year ended June 30,
​ | ​ | 2022 |  | 2021 |  | 2020
Major Product Lines: | ​ | ​ |  |  | ​ |  |  | ​ |
Intrusion and access alarm products | ​ | $ | 49,606 | ​ | $ | 36,794 | ​ | $ | 31,310
Door locking devices | ​ |  | 48,006 | ​ |  | 43,337 | ​ |  | 46,004
Services | ​ |  | 45,981 | ​ |  | 33,904 | ​ |  | 24,045
Total Revenues | ​ | $ | 143,593 | ​ | $ | 114,035 | ​ | $ | 101,359
Schedule of the allowance for doubtful accounts | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Balance at beginning of period |  | Charged to costs and expenses |  | Deductions/ (recoveries) |  | Balance at end of period
For the Year Ended June 30, 2020: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for doubtful accounts | ​ | $ | 88 | ​ | $ | 238 | ​ | $ | — | ​ | $ | 326
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
For the Year Ended June 30, 2021: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for doubtful accounts | ​ | $ | 326 | ​ | $ | 30 | ​ | $ | (130) | ​ | $ | 226
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
For the Year Ended June 30, 2022: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for doubtful accounts | ​ | $ | 226 | ​ | $ | 17 | ​ | $ | — | ​ | $ | 243

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 + Details
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