Equity (Details) - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended		12 Months Ended
	Sep. 10, 2014	Sep. 04, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Net proceeds from offering				$ 7,410
Share price (in dollars per share)			$ 0.28		$ 0.54
Applicable risk free interest rate (as a percent)			1.20%		1.60%
Sentient
Ownership interest in outstanding Common Stock (as a percent)			27.00%
Registered Offering
Registered offering stock units (in shares)	3,692,000
Number of shares of common stock per capital unit (in shares)	1
Number of common shares which can be purchased with each warrant	0.50
Sale price (in dollars per shares)	$ 0.86
Exercise price of warrants (in dollars per share)	$ 1.21
Term of warrants	5 years
Net proceeds from offering	$ 2,700	$ 1,500
Amount of underwriting commissions and expenses	$ 500
Share price (in dollars per share)		$ 1.01
Applicable risk free interest rate (as a percent)		1.60%
Fair value of warrants		$ 1,200
Private Placement | Sentient
Units issued (in shares)	5,800,000
Number of shares of common stock per capital unit (in shares)	1
Number of common shares which can be purchased with each warrant	0.50
Sale price (in dollars per shares)	$ 0.817
Exercise price of warrants (in dollars per share)	$ 1.21
Term of warrants	5 years
Net proceeds from offering	$ 4,700	$ 2,700
Amount of underwriting commissions and expenses	$ 300
Share price (in dollars per share)		$ 1.01
Applicable risk free interest rate (as a percent)		1.60%
Fair value of warrants		$ 1,900
Ownership interest in outstanding Common Stock (as a percent)	27.20%