| Balance Sheet Detail Information - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018 | 
|---|---|---|
| Finite Lived Intangible Assets [Line Items] | ||
| Intangible assets, gross | $ 4,620 | $ 9,198 | 
| Less: Accumulated amortization | (2,421) | (2,532) | 
| Intangible assets, net | 2,199 | 6,666 | 
| Domain Name and Marketing | ||
| Finite Lived Intangible Assets [Line Items] | ||
| Intangible assets, gross | 90 | 59 | 
| Leases | ||
| Finite Lived Intangible Assets [Line Items] | ||
| Intangible assets, gross | 1,033 | 2,239 | 
| Customer Relationships | ||
| Finite Lived Intangible Assets [Line Items] | ||
| Intangible assets, gross | 2,689 | 4,709 | 
| Purchased Software | ||
| Finite Lived Intangible Assets [Line Items] | ||
| Intangible assets, gross | $ 808 | $ 2,191 | 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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