6. Intangibles (Tables)  | 
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2018  | ||||||||||||||||||||||||||||||||||||||||||||||||||
| 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 June 30, 2018: 
 
 
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| X | ||||||||||
- References No definition available. 
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| X | ||||||||||
- 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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