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Segment Information (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Revenue from contracts with customers:	$ 12,558	$ 14,277	$ 19,166
Property, plant and equipment, net	878	886
Hong Kong and China [Member]
Revenue from contracts with customers:	2,186	2,794	4,086
Property, plant and equipment, net	127	147
Europe [Member]
Revenue from contracts with customers:	9,790	10,901	14,446
Other Asian Countries [Member]
Revenue from contracts with customers:		128	46
North America [Member]
Revenue from contracts with customers:	582	454	$ 588
Myanmar [Member]
Property, plant and equipment, net	$ 751	$ 739

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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