| 6. Intangibles (Tables) | 6 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||
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| Mar. 31, 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Intangible Assets Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Future amortization expense related to intangible assets | The following table summarizes estimated future amortization expense related to intangible assets that have net balances as of March 31, 2019: 
 
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| X | ||||||||||
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- References No definition available. 
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| X | ||||||||||
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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