Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Other comprehensive income, Before tax
Unrealized gains/(losses) on cash flow hedges, Before tax	$ 1,005	$ 294	$ 167
Other comprehensive income, Net of Tax
Opening balance, Net of Tax	361
Change in foreign currency translation adjustments, Net of Tax	(995)	638	(567)
Closing balance, Net of Tax	(412)	361
Foreign currency translation adjustments [Member]
Other comprehensive income, Before tax
Opening balance, Before tax	293	(345)	222
Change in foreign currency translation adjustments, Before tax	(995)	638	(567)
Closing balance, Before tax	(702)	293	(345)
Other comprehensive income, Tax effect
Opening balance, Tax effect
Change in foreign currency translation adjustments, Tax effect
Closing balance, Tax effect
Other comprehensive income, Net of Tax
Opening balance, Net of Tax	293	(345)	222
Change in foreign currency translation adjustments, Net of Tax	(995)	638	(567)
Closing balance, Net of Tax	(702)	293	(345)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Other comprehensive income, Before tax
Opening balance, Before tax	96	89	176
Unrealized gains/(losses) on cash flow hedges, Before tax	1,005	294	167
Reclassified to Statement of Operations	(690)	(287)	(254)
Net change, Before tax	315	7	(87)
Closing balance, Before tax	411	96	89
Other comprehensive income, Tax effect
Opening balance, Tax effect	(28)	(31)	(60)
Unrealized gains/(losses) on cash flow hedges, Tax effect	(292)	(84)	(57)
Reclassified to Statement of Operations	200	86	86
Net change, Tax effect	(92)	2	29
Closing balance, Tax effect	(120)	(28)	(31)
Other comprehensive income, Net of Tax
Opening balance, Net of Tax	68	58	116
Unrealized gains/(losses) on cash flow hedges, Net of Tax	713	210	110
Reclassified to Statement of Operations	(490)	(201)	(168)
Net change, Net of Tax	223	9	(58)
Closing balance, Net of Tax	$ 291	$ 68	$ 58

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, attributable to parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners).

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Amount of tax expense (benefit) allocated to accumulated other comprehensive income (loss) attributable to parent.

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