Quarterly report pursuant to Section 13 or 15(d)

BALANCE SHEET INFORMATION - Schedule of Service Parts Inventories (Details)

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BALANCE SHEET INFORMATION - Schedule of Service Parts Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Mar. 31, 2019
Balance Sheet Related Disclosures [Abstract]    
Finished goods $ 14,144 $ 13,437
Component parts 5,019 5,633
Total service inventories $ 19,163 $ 19,070