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Revenue and Vendor Concentrations (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2018
Revenue, Major Customer [Line Items] |  |  |  |  |
Accounts receivable, net | $ 14,566 |  | $ 14,566 |  | $ 16,821
Customer Concentration Risk | Sales Revenue Net |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Revenue | 6,100 | $ 7,900 |  |  |
Customer Concentration Risk | Accounts Receivable |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Accounts receivable, net | $ 5,500 | $ 4,500 | 5,500 | $ 4,500 |
Customer Concentration Risk | Customer One | Sales Revenue Net |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Revenue |  |  | $ 10,500 | $ 10,100 |
Total revenue, percentage | 16.00% | 26.00% | 18.00% | 24.00% |
Customer Concentration Risk | Customer Two | Sales Revenue Net |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Total revenue, percentage | 11.00% | 13.00% |  |  |
Customer Concentration Risk | Customer Three | Sales Revenue Net |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Total revenue, percentage |  | 10.00% |  |  |
Geographic Concentration Risk | Sales Revenue Net |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |
Total revenue, percentage | 28.00% | 24.00% | 33.00% | 25.00% |

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