Quarterly report pursuant to Section 13 or 15(d)

INVENTORIES - Schedule of Service Parts Inventories (Details)

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INVENTORIES - Schedule of Service Parts Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Mar. 31, 2018
Balance Sheet Related Disclosures [Abstract]    
Finished goods $ 13,159 $ 14,863
Component parts 5,392 7,026
Total service inventories $ 18,551 $ 21,889