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Accounts receivable reserves (Tables) | 12 Months Ended
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Sep. 30, 2018
Receivables [Abstract] |
Schedule of accounts receivable reserve | Changes in the reserves against accounts receivable were as follows (in thousands):
| Year ended September 30,
| 2018 |  | 2017 |  | 2016
Balance at beginning of year | $ | 6,843 |  |  | $ | 4,226 |  |  | $ | 3,385 |
Additions to reserve | 243 |  |  | 5,106 |  |  | 2,335 |
Deductions | (2,801 | ) |  | (2,489 | ) |  | (1,494 | )
Balance at end of year | $ | 4,285 |  |  | $ | 6,843 |  |  | $ | 4,226 |

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- Definition Tabular disclosure of any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). + References No definition available. + Details
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- References No definition available. + Details
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