Annual report pursuant to Section 13 and 15(d)

Commitments and contingencies - Schedule of Future Minimum Rental Payments for Operating Leases (Details)

v2.4.1.9
Commitments and contingencies - Schedule of Future Minimum Rental Payments for Operating Leases (Details) (USD $)
Dec. 31, 2014
Future minimum lease payments under all non-cancelable operating leases  
2015 $ 574,108us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2016 524,159us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2017 519,399us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2018 500,272us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2019 506,432us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
2020 and thereafter 2,235,785us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Total $ 4,860,155us-gaap_OperatingLeasesFutureMinimumPaymentsDue