OTHER CURRENT ACCRUED LIABILITIES (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
OTHER CURRENT ACCRUED LIABILITIES [Abstract]
Accrued liabilities for customer sales incentive programs	$ 11,710	$ 7,181
Other current accrued liabilities	4,524	3,825
Total other current accrued liabilities	$ 16,234	$ 11,006