Accrued expenses and other current liabilities (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Payroll and employee-related costs	$ 1,299,248	$ 34,218
Research and development costs	307,666	125,067
Consumer brand-related costs	198,887	23,635
Professional fees	129,625	15,500
Other	11,948	42,955
Deferred IPO issuance costs	0	175,149
Total	$ 1,947,374	$ 416,524