| Balance Sheet Detail Information - Schedule of Receivables (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018 | 
|---|---|---|
| Trade receivables, current, net: | ||
| Accounts receivable, current | $ 12,641 | $ 13,805 | 
| Less: Reserve for doubtful accounts | (740) | (511) | 
| Trade receivables, current, net | 11,901 | 13,294 | 
| Trade receivables , long term, net: | ||
| Accounts receivable, long term | 196 | 345 | 
| Less: Allowance for doubtful accounts | (196) | (345) | 
| Trade receivables , long term, net | 0 | 0 | 
| Total trade receivables, net: | ||
| Gross receivables | 12,837 | 14,150 | 
| Less: Reserve for doubtful accounts | (936) | (856) | 
| Total trade receivables, net | $ 11,901 | $ 13,294 | 
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- References No definition available. 
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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- References No definition available. 
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- References No definition available. 
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- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of allowance for credit loss on accounts receivable, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of allowance for credit loss on accounts receivable, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount to be collected within one year of the balance sheet date (or one operating cycle, if longer) from customers in accordance with the contractual provisions of long-term contracts or programs including amounts billed and unbilled as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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