Income taxes (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Income Tax Disclosure [Line Items]
Income (loss) before income tax	$ (1,491,687)	$ 465,154	$ (1,510,016)	$ (517,370)	$ 1,498,485
Expenses not deductible for tax purposes			875,353		307,761
Tax exemption and allowances			(249,500)		(247,846)
Tax flow income/loss			0		0
Taxable income			0		1,558,400
Tax of 17% (estimated Singapore Statutory Rate)			0		264,928
Tax rebate on net tax payable			0		(23,809)
Permanent difference			0		99,094
Tax liability per tax year			0		340,213
Under payment			0		1,618
Under provision			0		18,467
Total income tax liability	0	0	0	0	360,298
Tax liability per tax year			0		340,213
Under provision			0		18,467
Changes in deferred tax liability			0		12,323
Income tax expense			$ 0		$ 371,003