Related-Party Transactions - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) Agreement	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Agreement	Jun. 30, 2014 USD ($)
Related Party Transaction [Line Items]
Number of consulting agreement | Agreement	2		2
Series D Stock Holder
Related Party Transaction [Line Items]
Consulting fees paid to stockholder	$ 0	$ 11,250	$ 0	$ 22,250
Series E Stock Holder
Related Party Transaction [Line Items]
Consulting fees paid to stockholder	$ 0	$ 11,250	$ 0	$ 22,250