| 4. Discontinued Operations: Sale of Assets (Details - Allocation of sale price) - USD ($) | 3 Months Ended | 9 Months Ended | |
|---|---|---|---|
| Jun. 24, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | |
| Proceeds from sale of business | $ 610,000 | $ 0 | |
| Micromed Laboratories [Member] | |||
| Customer base | $ 850,000 | ||
| Less: Funds remaining in escrow | (60,000) | ||
| Less: Services due from buyer | (100,000) | ||
| Less: Working capital adjustment | (80,000) | ||
| Proceeds from sale of business | $ 610,000 | ||
| X | ||||||||||
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- Definition Disposal Group, Including Discontinued Operation, Working Capital No definition available. 
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| X | ||||||||||
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- Definition Amount classified as cash and cash equivalents attributable to disposal group held for sale or disposed of. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- Definition Amount classified as deferred revenue attributable to disposal group held for sale or disposed of. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- Definition Amount classified as intangible assets, excluding goodwill, attributable to disposal group held for sale or disposed of. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- Details 
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