Intangible assets (Tables)

12 Months Ended

Mar. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Other intangible assets

	March 31,
	2015			2016
	$ in thousands			$ in thousands
Cost		6,939			6,159
Less: accumulated amortization		(2,820	)		(2,867	)
		4,119			3,292

Components of other intangible assets

	March 31,
	2015		2016
	$ in thousands		$ in thousands
Land use right of factory land in Shenzhen, Guangdong, PRC		1,880		1,599
Land use right of factory land in Xinxing, Guangdong, PRC		2,239		1,652
Golf club membership		-		41
		4,119		3,292

Schedule of amortization expenses

Year ending March 31,	$ in thousands
2017		284
2018		284
2019		284
2020		284
2021		284
Thereafter		1,872
Total		3,292