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REVENUE RECOGNITION - Changes in contract liabilities (Details) $ in Thousands | 9 Months Ended
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Jun. 30, 2020 USD ($)
REVENUE RECOGNITION |
Customer advances beginning balance | $ 6,726
Additions | 53,834
Deductions | (49,420)
Customer advances ending balance | 11,140
Unbilled receivables beginning balance | 2,263
Additions | 4,848
Deductions | (4,601)
Unbilled receivables ending balance | $ 2,510

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