Convertible Redeemable Preferred Stock and Stockholders' Equity (Details)				1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 14, 2015 shares	May. 15, 2015	May. 15, 2014 USD ($) $ / shares shares	Jun. 30, 2015 USD ($) $ / shares shares	Apr. 30, 2015 USD ($) $ / shares	Oct. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($) item $ / shares shares
Equity
Net proceeds from the sale of common stock | $						$ 7,821,000
Proceeds from warrant exercises | $						1,512,000
Incremental fair value of warrants | $						$ 436,000
Offering
Equity
Net proceeds from the sale of common stock | $				$ 7,800,000
Price per share | $ / shares				$ 2.75
Issuance of common stock				3,636,384
Offering | Director
Equity
Issuance of common stock	193,333
Warrant | Offering | Underwriters
Equity
Number of shares of common stock subject to warrant				109,091
Warrants exercise price | $ / shares				$ 2.75
Warrants expiration term						5 years
Convertible Note
Equity
Interest rate on convertible notes				6.00%
Principal amount | $				$ 500,000
Conversion of convertible notes payable to common stock (in shares)				182,266
Series A Warrant | Warrant
Equity
Number of shares of common stock subject to warrant							2,042,589
Warrants exercise price | $ / shares							$ 3.70
Common Stock | Subscription Agreement | KIP
Equity
Price per share | $ / shares				$ 1.85
Period after listing, the closing of private placement shall close				15 days
Number of shares per subscription agreement				1,081,081
Subscription agreement receivable | $						$ 2,000,000
Series A Convertible Redeemable Preferred Stock
Equity
Price per share | $ / shares							$ 1.85
Gross proceeds from issuance | $							$ 7,500,000
Series A Convertible Redeemable Preferred Stock | Subscription Agreement
Equity
Number of shares sold							4,207,987
Series A Convertible Redeemable Preferred Stock | Offering
Equity
Number of common shares into which share is convertible				4,319,426
Series A Convertible Redeemable Preferred Stock | Series A Warrant
Equity
Number of purchasers of stock | item							47
Number of shares of common stock subject to warrant						564,662
Proceeds from warrant exercises | $						$ 1,411,655
Incremental fair value of warrants | $					$ 436,000
Series A Convertible Redeemable Preferred Stock | Series A Warrant | Actual
Equity
Warrants exercise price | $ / shares					$ 2.50
Series A Convertible Redeemable Preferred Stock | Series A Warrant | Previously Reported
Equity
Warrants exercise price | $ / shares					$ 3.70
Series A Convertible Redeemable Preferred Stock | Series A Warrant | Offering
Equity
Offering price per share that triggers the issuance of additional shares related to the public offering | $ / shares				$ 3.125
Percentage of public offering price				80.00%
Issuance of common stock				77,006
Series A Convertible Redeemable Preferred Stock | Series A Warrant | Warrant
Equity
Number of shares of common stock subject to warrant						1,661,055
Dividend rate					0.00%
Risk-free rate					1.60%
Expected volatility					85.90%
Series A Convertible Redeemable Preferred Stock | Series A Warrant | Warrant | Minimum
Equity
Contractual term					4 years
Series A Convertible Redeemable Preferred Stock | Series A Warrant | Warrant | Maximum
Equity
Contractual term					5 years
Series A Convertible Redeemable Preferred Stock | Service Provider Warrant | Warrant
Equity
Number of shares of common stock subject to warrant			316,395
Warrants exercise price | $ / shares			$ 2.035
Warrant expense | $			$ 99,000
Series A Convertible Redeemable Preferred Stock | Convertible Debt Warrant | Warrant
Equity
Number of shares of common stock subject to warrant			343,559			289,505
Warrants exercise price | $ / shares			$ 1.85
Adjustment to paid-in capital, warrant fair value | $			$ 105,000
Warrants expiration term		5 years
Conversion of convertible notes payable to common stock (in shares)				54,054