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Contract Liabilities (Details) - USD ($) | Jun. 30, 2018 | Mar. 31, 2018
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Short-term contract liabilities [Abstract] |  |
Customer allowances earned | $ 7,409,000 | $ 11,370,000
Customer core returns accruals | 4,154,000 | 4,697,000
Accrued core payment, net | 20,520,000 | 16,536,000
Total short-term contract liabilities | 32,083,000 | 32,603,000
Long-term contract liabilities [Abstract] |  |
Customer core returns accruals | 29,035,000 | 29,710,000
Accrued core payment, net | 16,631,000 | 18,473,000
Total long-term contract liabilities | 45,666,000 | 48,183,000
Total contract liabilities | $ 77,749,000 | $ 80,786,000

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- Definition The amount of obligations for accrued core payment, classified as current. + References No definition available. + Details
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- Definition The amount of obligation representing the estimated future credits to be provided for Used Cores returned by the customers, classified as current. + References No definition available. + Details
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