Debt Obligations - Additional Information (Details) (USD $)	0 Months Ended	3 Months Ended		1 Months Ended
	Dec. 30, 2014 Agreement	Mar. 31, 2015	Mar. 31, 2014	Aug. 31, 2014 Institution	Aug. 22, 2014
Debt Obligations [Line Items]
Debt instrument, amortization expense		$ 126,566	$ 47,500
Financing costs		219,908
Number of convertible promissory note agreements	2
Accrued interest	$ 14.00
Debt conversion, converted instrument, rate	80.00%
Extinguishment of debt as percentage of principal amount	80.00%
Investor equity with warrants percentage	80.00%
Debt Instrument, Convertible, Terms of Conversion Feature		As of the Company’s qualified initial public offering the number of shares into which the notes will be converted is equal to the outstanding principal and accrued interest divided by the $14.00 price per share paid by investors purchasing such newly issued equity securities. 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 will resulted in the conversion of their entire holdings of preferred stock into common stock, at conversion rates then in effect. Under the second Note Agreement, up to 80% of the total 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 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. As of March 31, 2015, all principal participating investors in the first Note Agreement had met their obligations to purchase the committed amount under the agreement.
Amortization of warrant discount		87,470	51,377
Convertible Debt
Debt Obligations [Line Items]
Amortization of warrant discount		32,006	0
Series E Redeemable Convertible Preferred Stock
Debt Obligations [Line Items]
Proceeds from sale of preferred stock, net of issuance costs			7,415,552
Growth Term Loan
Debt Obligations [Line Items]
Number of loan lending institutions				2
Financing costs				100,000
Growth Term Loan | Series E Stock
Debt Obligations [Line Items]
Financial institution warrant issued, share				2,512,562
Class of warrant or right per share price				$ 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		100,000	0
Debt instrument, fixed rate				8.50%
Debt instrument, description		The interest-only payment period is extendable through January 31, 2016, upon funding of the second tranche prior to its expiration.
Monthly periodic payment				347,000
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 Note One
Debt Obligations [Line Items]
Debt instrument, fixed rate	8.00%
Debt instrument, maturity date		Mar. 31, 2016
Issuance of notes to existing investors	7,339,165
Number of future issued to existing investors	5
Closing value	1,500,000
Number of days of notice to participating investors	10 days
Convertible Note One | Series E Stock
Debt Obligations [Line Items]
Financial institution warrant issued, share	5,029,114
Class of warrant or right per share price	$ 0.2189
Convertible Note Two
Debt Obligations [Line Items]
Debt instrument, fixed rate	8.00%
Debt instrument, maturity date		Mar. 31, 2016
Issuance of notes to existing investors	6,203,971
Number of future issued to existing investors	4
Closing value	1,703,971
Number of days of notice to participating investors	10 days
Percentage of aggregate principal amount	50.00%
Conversion percentage	80.00%
Convertible Note Two | Series E Redeemable Convertible Preferred Stock
Debt Obligations [Line Items]
Financial institution warrant issued, share	4,282,472
Class of warrant or right per share price	$ 0.2189
Convertible Note Two | Minimum | IPO
Debt Obligations [Line Items]
Proceeds from issuance of common stock	20,000,000
Convertible Note Two | Minimum | Private Placement
Debt Obligations [Line Items]
Proceeds from sale of preferred stock, net of issuance costs	$ 20,000,000