Loans payable - Aggregate Amount Outstanding (Details)	Mar. 31, 2018 USD ($)
Loans Payable - Aggregate Amount Outstanding Details
Within 1 year	$ 152,402
1 to 2 years	3,038,567
2 to 3 years	109,222
3 to 4 years	113,899
Thereafter	3,770,686
Total	$ 7,184,776