Loans payable - Aggregate Amount Outstanding (Details)	Jun. 30, 2018 USD ($)
Loans Payable - Aggregate Amount Outstanding Details
Within 1 year	$ 133,617
1 to 2 years	3,043,331
2 to 3 years	109,547
3 to 4 years	114,196
Thereafter	3,663,486
Total	$ 7,064,177