Segment Information (Detail Textual)	12 Months Ended
	Mar. 31, 2019 Customer Segments	Mar. 31, 2018 Customer Segments	Mar. 31, 2017 Customer
Segment Reporting [Abstract]
Number of reportable segments | Segments	1	1
Number of customer with 10% or more of total revenue	1	0	0
Number of customer with 10% or more of total accounts receivables and unbilled accounts receivable	1	1	0
Concentration risk benchmark description			10% or more