INCOME TAXES (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Long-term deferred tax assets (liabilities):
Property, plant and equipment	$ (3,336)	$ (4,484)
Prepaid expenses	(325)	(12)
Accrued stock compensation and other employee benefits	2,722	2,432
Accrued restructuring costs and other expenses	2,541	538
Tax credit carryforwards	5,233	0
Loss carryforwards	18,628	5,653
Intangibles and goodwill	(21,153)	(17,357)
Translation adjustments and withholdings taxes	(3,472)	0
Other	540	0
Net long-term deferred tax assets	1,378	(13,230)
Valuation allowance	(15,231)	0
Total net deferred tax asset (liability)	$ (13,853)	$ (13,230)