Accrued expenses and other current liabilities (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Payroll and employee-related costs	$ 1,453,665	$ 1,299,248
Research and development costs	938,665	307,666
Professional fees	153,219	129,625
Consumer product-related costs	42,024	198,887
Other	0	11,948
Total	$ 2,587,573	$ 1,947,374