Basis of Presentation (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Oct. 31, 2021 |
Oct. 31, 2020 |
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| Basis of Presentation (Details) [Line Items] | ||
| Fair value investments | $ 29,810 | |
| Cost of marketable securities | 30,089 | |
| Unrealized losses marketable securities | $ 196 | |
| Clinical Services [Member] | Third-party payers” and “Health Maintenance Organizations [Member] | ||
| Basis of Presentation (Details) [Line Items] | ||
| Concentration risk, percentage | 32.00% | |
| Clinical Services [Member] | Revenue [Member] | Third-party payers” and “Health Maintenance Organizations [Member] | ||
| Basis of Presentation (Details) [Line Items] | ||
| Concentration risk, percentage | 36.00% | 33.00% |
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- Definition Concentration risk percentage. No definition available.
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- Definition Cost of marketable securites. No definition available.
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- Definition Amount of investment in marketable security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of unrealized gain (loss) on investment in marketable security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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