Other income, net (Tables)

12 Months Ended

Mar. 31, 2019

Other Income and Expenses [Abstract]

Schedule of Other income

	Year Ended March 31,
	2017		2018		2019
	$ in thousands		$ in thousands		$ in thousands
Gain on disposal of property, plant and equipment		—		—		5
Gain on disposal of intangible assets		79		—		—
Gain from deregistration of subsidiaries		22		—		—
Other gains		453		342		103
Other income, net		554		342		108