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Operating Segments and Geographic Information	9 Months Ended
	Jan. 31, 2022
Segment Reporting [Abstract]
Operating Segments and Geographic Information	(17) Operating Segments and Geographic Information The Company’s business consists of one segment as this represents how our Chief Operating Decision Maker views the Company’s operations and financial position. The Company operates on a worldwide basis with two wholly-owned subsidiaries, 3Dent and MAR, and subsidiaries in the UK and in Australia. Revenues and expenses are generally attributed to the operating company that bills the customers. During each of the nine months ended January 31, 2022 and 2021, the Company’s primary business operations were in North America.

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The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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