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Commitments and Contingencies (Details Narrative) - USD ($) $ in Millions | Apr. 30, 2022 | Jul. 31, 2021
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Product Liability Contingency [Line Items] |  |
Accrued liabilities | $ 38.1 | $ 38.3
Purchase obligation | 5.0 |
Performance bonds outstanding | 22.0 |
Federal Telecommunications Relay Services Fund [Member] |  |
Product Liability Contingency [Line Items] |  |
Loss contingency, estimate of possible loss | 2.9 |
Universal Service Fund [Member] |  |
Product Liability Contingency [Line Items] |  |
Loss contingency, estimate of possible loss | $ 1.8 |

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