Equity - Issue and Conversion (Details)					2 Months Ended	12 Months Ended
	Dec. 20, 2016 USD ($) shares	Jun. 10, 2016 USD ($) item $ / shares shares	May 06, 2016 USD ($) $ / shares shares	Feb. 11, 2016 USD ($) item $ / shares shares	Feb. 25, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) shares	Sep. 30, 2016 shares	Dec. 31, 2015 shares
Proceeds from issuance of common stock						$ 3,599,000
Common stock, shares outstanding | shares						89,020,041		53,335,333
ATM Agreement
Aggregate value of securities allowed under agreement	$ 5,000,000
Aggregate number of securities allowed under agreement (in shares) | shares	10,000,000
Commission rate (as a percent)	2.00%
Legal expenses	$ 50,000
Equity issue costs	$ 103,000
Common stock issued (in shares) | shares						0
2016 Warrants
Term of warrants			5 years
Registered Offering
Equity issue costs			$ 400,000
Common stock issued (in shares) | shares			8,000,000
Sale price (in dollars per shares) | $ / shares			$ 0.50
Proceeds from issuance of common stock			$ 3,600,000
Gross proceeds from common stock sale			$ 4,000,000
Registered Offering | 2016 Warrants
Exercise price of warrants (in dollars per share) | $ / shares			$ 0.75
Number of common shares which can be purchased with each warrant | shares			0.75
Warrants outstanding (in shares) | shares			6,000,000
Warrant becomes exercisable			6 months
Term of warrants			5 years
Warrant liability fair value			$ 3,600,000
Volatility (as a percent)			105.00%
Risk free interest rate (as a percent)			0.74%
Sentient Loan
Amount of debt converted to equity		$ 1,100,000		$ 3,900,000
Amount of accrued interest converted to equity		$ 34,000		$ 100,000
Equity shares issued upon conversion of debt | shares		4,011,740		23,355,000
Exercise price of warrants (in dollars per share) | $ / shares		$ 0.289		$ 0.172
Stock price trigger (as a percent)		90.00%		90.00%
Consecutive trading days, period | item		15		15
Debt outstanding						$ 0
Subsequent Event | ATM Agreement
Commission rate (as a percent)					2.00%
Equity issue costs					$ 2,000
Common stock issued (in shares) | shares					640,000
Sale price (in dollars per shares) | $ / shares					$ 0.74
Proceeds from issuance of common stock					$ 475,000
Commission payment					10,000
Gross proceeds from common stock sale					$ 475,000
Sentient
Ownership (as a percent)						47.00%	46.00%
Common stock, shares outstanding | shares						88,900,000	89,700,000