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RELATED PARTY TRANSACTION RELATED PARTY TRANSACTION - Narrative (Details) - $ / shares |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 12, 2016 | May 31, 2016 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Related Party Transaction [Line Items] |  |  |  |  |
Purchase of common shares (in shares) |  |  | 709,970 | 393,864 | 212,424
Schawk Inc | Director and President |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Purchase of common shares (in shares) |  | 970,000 |  |  |
Purchase price (in dollars per share) |  | $ 50.6921625 |  |  |
Average of high/low trading prices (as a percent) | 96.76% |  |  |  |

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