Income Taxes (Details 4) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Changes in unrecognized income tax benefits were as follows:
Opening balance	$ 441	$ 441	$ 441
Increase in unrecognized tax benefits - due to tax positions taken in current period for prior periods
Closing balance	$ 441	$ 441	$ 441