Commitments and Contingencies - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) ft²	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) ft²	Sep. 30, 2014 USD ($)
Commitment And Contingencies [Line Items]
Terms of lease			3 years
Standby letters of credit	$ 13,730		$ 13,730
Area of land space expected to be occupied by company \| ft²	6,326		6,326
Expected operating lease term			5 years
Standby letter of credit amount increased due to lease amendment			$ 36,375
Rent expense	$ 14,024	$ 8,100	$ 41,472	$ 21,825
Norwood, Ma [Member]
Commitment And Contingencies [Line Items]
Area of office space \| ft²			2,387