Quarterly report pursuant to Section 13 or 15(d)

BALANCE SHEET INFORMATION - Schedule of Other Current Liabilities (Details)

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BALANCE SHEET INFORMATION - Schedule of Other Current Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Mar. 31, 2019
Accrued expenses $ 6,500 $ 8,925
Accrued settlement 10,452 10,452
Accrued warranty 4,172 3,456
Operating Lease, Liability 9,928  
Asset retirement obligation 1,935 1,936
Other accrued liabilities 29,674 29,025
Accrued Liabilities, Current $ 29,674 $ 29,025