Income tax (Tables)

12 Months Ended

Mar. 31, 2016

Income Tax Disclosure [Abstract]

Loss before income tax

	2014			2015			2016
	$ in thousands			$ in thousands			$ in thousands
Hong Kong		(1,495	)		(55	)		3,933
PRC		1,337			148			(167	)
Others		(63	)		(20	)		(585	)
Total		(221	)		73			3,181

Deferred taxes

	2014		2015			2016
	$ in thousands		$ in thousands			$ in thousands
Current income tax expense		-		(13	)		(310	)
Income tax credit		-		1,050			-
Total income tax credit / (expense)		-		1,037			(310	)

Geographic tax expense

	2014		2015			2016
	$ in thousands		$ in thousands			$ in thousands
Hong Kong		-		1,050			(310	)
PRC		-		(13	)		-
Total		-		1,037			(310	)

Income tax liabilities

	2015		2016
	$ in thousands		$ in thousands
Non-current		-		-
Current		7		317
Total		7		317

Deferred tax assets and liabilities

Total property, plant and equipment, net by geographical areas are as follows:

	March 31,		March 31,
	2015		2016
	$ in thousands		$ in thousands
Hong Kong		1,194		1,159
The PRC		11,290		10,558
Total property, plant and equipment		12,484		11,717

(c) The following is a summary of net export sales by geographical areas, which are defined by the final shipment destination, constituting 10% or more of total sales of the Company for the years ended March 31, 2014, 2015 and 2016:

	Year ended March 31,
	2014				2015				2016
	$ in thousands		%		$ in thousands		%		$ in thousands		%
United States		25,203		81		21,271		73		14,062		59
Germany		4,688		15		6,210		22		4,568		19
		29,891		96		27,481		95		18,630		78

Changes in valuation allowance

	2014		2015		2016
	$ in thousands		$ in thousands		$ in thousands
Balance, April 1		700		853		4,459
Charged / (credited) to income tax expense		153		3,606		-
Balance, March 31		853		4,459		4,459

Tax expense attributable to earnings

	2014			2015			2016
	$ in thousands			$ in thousands			$ in thousands
(Loss) / income before income taxes		(221	)		73			3,181
Income tax benefit / (expense) on pretax income at statutory rate		36			(12	)		(525	)
Effect of different tax rates of subsidiaries operating in other jurisdictions		(28	)		(233	)		(95	)
Profit not subject to income tax		1,129			542			387
Expenses not deductible for income tax purposes		(1,137	)		(336	)		(255	)
Increase in valuation allowance		153			3,606			-
Reversal of provision from conclusion of tax review with tax authorities		-			2,595			-
Tax expense from conclusion of tax review with tax authorities		-			(1,545	)		-
Utilization of tax losses not previously recognized / (tax losses not yet recognized)		(153	)		(3,580	)		178
Total income tax (expense) / credit		-			1,037			(310	)