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Revenue Recognition (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Oct. 31, 2021 | Oct. 31, 2020 | Jul. 31, 2021
Revenue Recognition [Abstract] |  |  |
Contract with Customer, Liability | $ 2,589,000 |  | $ 2,519,000
Deferred Revenue, Revenue Recognized | $ 289,000 | $ 297,000 |
Remaining Performance Obligations Expected as Revenue During the Remainder of the Current Fiscal Year | 32.00% |  |
Remaining Performance Obligations Expected as Revenue Over the Next Full Fiscal Year | 31.00% |  |

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- Definition Remaining Performance Obligations Expected as Revenue Over the Next Full Fiscal Year + References No definition available. + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044 + Details
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