Debt Obligations - Additional Information (Details)		1 Months Ended		3 Months Ended		9 Months Ended
	Dec. 30, 2014 USD ($) Agreement Future $ / shares shares	May. 31, 2015 USD ($) $ / shares shares	Aug. 31, 2014 USD ($) Institution $ / shares shares	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Aug. 31, 2015	Dec. 31, 2014 USD ($)	Aug. 22, 2014 USD ($)
Debt Obligations [Line Items]
Debt instrument, amortization expense				$ 51,481	$ 46,867	$ 229,232	$ 141,551
Financing costs						75,523
Number of convertible promissory note agreements | Agreement	2
Issuance of common stock from initial public offering						45,354,186
Investor equity with warrants percentage	80.00%
Outstanding convertible notes payable	$ 0
Fair value of warrants									$ 741,828
Conversion of stock, amount converted						4,544,384
Percentage of possible outcomes in debt note agreements issued		50.00%
Write off unamortized debt discount and deferred financing costs				705,217		705,217
Convertible Debt
Debt Obligations [Line Items]
Amortization of warrant discount				0	0	90,222	0
Series E Convertible Preferred Stock
Debt Obligations [Line Items]
Class of warrant or right per share price | $ / shares	$ 0.2189
Growth Term Loan
Debt Obligations [Line Items]
Number of loan lending institutions | Institution			2
Final Payment Percentage								4.75%
Financing costs			$ 100,000
Growth Term Loan | Scenario Forecast One
Debt Obligations [Line Items]
prepayment fee Percentage								3.00%
Growth Term Loan | Scenario Forecast Two
Debt Obligations [Line Items]
prepayment fee Percentage								2.00%
Growth Term Loan | Scenario Forecast Three
Debt Obligations [Line Items]
prepayment fee Percentage								1.00%
Growth Term Loan | Series E Stock
Debt Obligations [Line Items]
Financial institution warrant issued, share | shares			2,512,562
Class of warrant or right per share price | $ / shares			$ 0.2189
Warrants expiration date			Aug. 22, 2024
Growth Term Loan A
Debt Obligations [Line Items]
Term loan payable										$ 11,000,000
Debt instrument, amortization expense				31,595	$ 16,125	$ 120,627	$ 16,125
Debt instrument, fixed rate			8.50%
Monthly periodic payment			$ 408,296
Growth Term Loan A | Maximum
Debt Obligations [Line Items]
Debt instrument, maturity date						Sep. 30, 2018
Growth Term Loan A | Minimum
Debt Obligations [Line Items]
Debt instrument, maturity date						Sep. 30, 2015
Growth Term Loan B
Debt Obligations [Line Items]
Term loan payable			5,000,000
Debt issuance costs			$ 300,000
Convertible Notes
Debt Obligations [Line Items]
Debt conversion, converted instrument, rate	80.00%
Extinguishment of debt as percentage of principal amount	80.00%
Debt Instrument, Convertible, Terms of Conversion Feature						Under each of the Note Agreements, the failure of a principal or major participating investor to invest their committed amount at each of the closings resulted in the conversion of a percentage of the investor’s preferred shares into common shares at the applicable conversion rates in effect pursuant to the Company’s restated certificate of incorporation. Under the first Note Agreement, failure of a principal investor to purchase their committed amount resulted in the conversion of their entire holdings of Convertible Preferred Stock into common stock, at conversion rates then in effect. Under the second Note Agreement, up to 80% of the total Convertible Preferred Stock held by such investor will be converted into common stock, at conversion rates then in effect. In addition, failure to purchase the full committed amount in any closing will result in the termination of the applicable investor’s warrants, in whole or in part, and the forgiveness and extinguishment of 80% of the aggregate principal amount of the applicable investor’s outstanding notes, if any. In the event the Company sold new shares of stock in a qualified initial public offering or preferred stock in a private placement, an investor’s failure to participate in the subsequent equity financing, in an amount equal to their applicable remaining committed amount under the Note Agreements, would result in the conversion of up to 80% of the non-participating investor’s aggregate Convertible Preferred Stock holding as of the closing date of the subsequent equity financing, along with a reduction of up to 80% of the non-participating investor’s warrants. Pursuant to the provisions of the second Note Agreement, certain preferred shares were optionally converted into common stock as of December 30, 2014.
Fair value of warrants				$ 741,828		$ 741,828
Settlement of outstanding principal and accrued interest on convertible notes by issuance of common stock, shares | shares		324,591
Conversion price per share | $ / shares		$ 14.00
Conversion of stock, amount converted		$ 4,500,000
Convertible Notes | Minimum | Private Placement
Debt Obligations [Line Items]
Proceeds from sale of preferred stock, net of issuance costs	$ 20,000,000
Convertible Note One
Debt Obligations [Line Items]
Debt instrument, fixed rate	8.00%
Debt instrument, maturity date						Mar. 31, 2016
Issuance of common stock from initial public offering	$ 7,339,165
Number of future issued to existing investors | Future	5
Closing value	$ 1,500,000
Number of days of notice to participating investors	10 days
Convertible note draws		4,500,000
Convertible Note One | Series E Convertible Preferred Stock
Debt Obligations [Line Items]
Financial institution warrant issued, share | shares	5,029,114
Class of warrant or right per share price | $ / shares	$ 0.2189
Convertible Note Two
Debt Obligations [Line Items]
Debt instrument, fixed rate	8.00%
Debt instrument, maturity date						Mar. 31, 2016
Issuance of common stock from initial public offering	$ 6,203,971
Number of future issued to existing investors | Future	4
Closing value	$ 1,703,971
Number of days of notice to participating investors	10 days
Conversion percentage	80.00%
Convertible note draws		$ 0
Convertible Note Two | Series E Convertible Preferred Stock
Debt Obligations [Line Items]
Financial institution warrant issued, share | shares	4,282,472
Class of warrant or right per share price | $ / shares	$ 0.2189