Intangible Assets - Weighted Average Amortization Period (Details)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Manufacturing license
Intangible Assets
Weighted Average Amortization Period	17 years	17 years
Technology
Intangible Assets
Weighted Average Amortization Period	10 years	10 years
Trade name & parts, service and TA100 customer relationships | Minimum
Intangible Assets
Weighted Average Amortization Period	1 year 2 months 12 days	1 year 2 months 12 days
Trade name & parts, service and TA100 customer relationships | Maximum
Intangible Assets
Weighted Average Amortization Period	5 years	5 years