Equity - Warrants (Details) - USD ($)	1 Months Ended			6 Months Ended
	May 31, 2016	Sep. 30, 2014	Sep. 30, 2012	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	May 31, 2016
Weighted Average Exercise Price Per Share
Proceeds from issuance of common stock				$ 674,000	$ 3,599,000
Warrant liability						$ 1,500,000
Warrant
Number of Underlying Shares
Outstanding, beginning balance (in shares)				17,578,950
Dilution adjustment (in shares)				52,674
Outstanding, end balance (in shares)				17,631,624
Weighted Average Exercise Price Per Share
Outstanding, beginning balance (in dollars per share)				$ 2.17
Outstanding, end balance (in dollars per share)				$ 2.17
Warrants outstanding (in shares)				17,578,950		17,631,624
2012 Warrants
Number of Underlying Shares
Dilution adjustment (in shares)				2,737,060
Outstanding, end balance (in shares)				6,168,709
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)				$ 4.68
Warrants outstanding (in shares)				6,168,709		6,168,709
2014 Warrants
Number of Underlying Shares
Dilution adjustment (in shares)				716,915
Outstanding, end balance (in shares)				5,462,915
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)				$ 0.87
Warrants outstanding (in shares)				5,462,915		5,462,915
Level 3 | Warrant
Weighted Average Exercise Price Per Share
Warrant liability						$ 1,500,000
Level 3 | 2012 Warrants
Weighted Average Exercise Price Per Share
Warrant liability						5,000
Level 3 | 2014 Warrants
Weighted Average Exercise Price Per Share
Warrant liability						$ 1,500,000
Sentient | 2012 Warrants
Number of Underlying Shares
Granted (in shares)			3,431,649
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)			$ 8.42
Number of shares of common stock per capital unit (in shares).			1
Term of warrants			5 years
Number of common shares which can be purchased with each warrant			0.5
Sentient | 2014 Warrants
Number of Underlying Shares
Granted (in shares)		4,746,000
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)		$ 1.21
Number of shares of common stock per capital unit (in shares).		1
Term of warrants		5 years
Number of common shares which can be purchased with each warrant		0.5
Registered Offering
Weighted Average Exercise Price Per Share
Common stock issued (in shares)	8,000,000
Sale price (in dollars per shares)							$ 0.50
Registered Offering | 2016 Warrants
Number of Underlying Shares
Outstanding, end balance (in shares)	6,000,000
Weighted Average Exercise Price Per Share
Granted (in dollars per share)	$ 0.75
Number of shares of common stock per capital unit (in shares).	0.75
Term of warrants	5 years
Warrants outstanding (in shares)	6,000,000						6,000,000