BALANCE SHEET INFORMATION - Goodwill (Details) - USD ($)  | 
6 Months Ended | |
|---|---|---|
Sep. 30, 2021  | 
Sep. 30, 2020  | 
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| Goodwill | ||
| Balance at March 31, 2021 | $ 3,466,000 | |
| Goodwill acquired | 6,796,000 | |
| Balance at September 30, 2021 | 10,262,000 | |
| Goodwill, Impairment Loss | $ 0 | $ 0 | 
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available. 
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