Redeemable Convertible Preferred Stock - Additional Information (Details) (USD $)	0 Months Ended		3 Months Ended	12 Months Ended
	Mar. 31, 2014	Feb. 04, 2014	Mar. 31, 2015	Dec. 31, 2014	Jan. 30, 2015	Aug. 22, 2014
Class Of Stock [Line Items]
Common stock, shares authorized			600,000,000	600,000,000
Preferred stock, shares authorized			472,083,383
Outstanding convertible preferred stock			2,127,463
Fair value of warrants			$ 727,737	$ 741,828
Dividends declared			0
Non-participating Holders
Class Of Stock [Line Items]
Percentage of preferred stock converted into common stock				80.00%
Preferred Stock
Class Of Stock [Line Items]
Fair value of warrants			5,665,000
Minimum
Class Of Stock [Line Items]
Liquidation Event Voting Power Of Surviving Entity Percentage			50.00%
Series E Redeemable Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock, shares authorized		99,132,024
Convertible preferred stock, price per share	$ 0.2189	$ 0.2189	$ 0.2189
Preferred stock, shares authorized			185,046,445	185,046,445
Issuance of preferred stock, net of issuance cost, shares	354,062	34,099,476
Common stock, conversion basis	1		0.009
Preferred stock par value, per share			$ 0.001
Liquidation preference			The Series D Stock and Series E Stock liquidation preference is equal to two times the original issue price of the Series D Stock or Series E Stock, respectively, plus any accrued but unpaid dividends whether or not declared. In the event of a Liquidation Event, payment of dividends, or share redemption, the holders of Series E Stock have preference over the holders of the Series A/B/C/D Stock and the Common Stock.
Stock holders voting percentage required for stock redemption			60.00%
Preferred stock cumulative dividend percentage			8.00%
Preferred stock cumulative dividends				7,643,378
Voting power of outstanding shares						60.00%
Preferred stock redemption value			11,003,054
Stock purchased by convertible note warrant holder, shares					51,681
Stock purchased by convertible note warrant holder price per share					$ 0.2189
Series A Preferred Stock
Class Of Stock [Line Items]
Preferred stock, shares authorized			1,292,084	1,292,084
Common stock, conversion basis			0.030
Preferred stock par value, per share			$ 0.001
Stock holders voting percentage required for stock redemption			66.67%
Series B Preferred Stock
Class Of Stock [Line Items]
Preferred stock, shares authorized			11,919,624	11,919,624
Common stock, conversion basis			0.011
Preferred stock par value, per share			$ 0.001
Series C Preferred Stock
Class Of Stock [Line Items]
Preferred stock par value, per share			$ 0.001
Series D Redeemable Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock, price per share			$ 0.2189
Preferred stock, shares authorized			237,031,908	237,031,908
Common stock, conversion basis			0.009
Preferred stock par value, per share			$ 0.001
Liquidation Event Voting Power Of Surviving Entity Percentage			60.00%
Liquidation preference			The Series D Stock and Series E Stock liquidation preference is equal to two times the original issue price of the Series D Stock or Series E Stock, respectively, plus any accrued but unpaid dividends whether or not declared. In the event of a Liquidation Event, payment of dividends, or share redemption, the holders of Series E Stock have preference over the holders of the Series A/B/C/D Stock and the Common Stock.
Preferred stock cumulative dividend percentage			8.00%
Preferred stock cumulative dividends			8,440,716
Preferred stock redemption value			38,061,476
Series D Redeemable Convertible Preferred Stock | Maximum
Class Of Stock [Line Items]
Series D Stock original issue price			$ 0.8756
A B C D Stock And Series E Stock
Class Of Stock [Line Items]
Underwritten public offering resulting in gross proceeds			30,000,000
Stock holders voting percentage required for stock redemption			60.00%
Series C-1
Class Of Stock [Line Items]
Common stock, conversion basis			0.014
Series C-2
Class Of Stock [Line Items]
Common stock, conversion basis			0.009
Series E Warrant
Class Of Stock [Line Items]
Purchase of warrant exercise price per share		$ 0.001
Purchase price of preferred stock per Series E warrant	$ 0.0001	$ 0.0001
Warrants exercise price	$ 0.001	$ 0.001
Financial institution warrant issued, share	118,017	11,366,486
Proceeds from Issuance of preferred stock and warrants	77,634	7,476,879
Fair value of warrants			1,890,000
Warrant Issuance Costs			$ 48,384
Preferred stock accreted redemption period			5 years
Series E Warrant | Maximum
Class Of Stock [Line Items]
Financial institution warrant issued, share		33,044,008
Series E Warrant | Series E Redeemable Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock, price per share			$ 0.1645
Tranche One | Series E Redeemable Convertible Preferred Stock
Class Of Stock [Line Items]
Financial institution warrant issued, share		49,566,012
Tranche One | Series E Warrant
Class Of Stock [Line Items]
Financial institution warrant issued, share		16,522,004