Equity - Warrants (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended			12 Months Ended
	Sep. 10, 2019	Jul. 17, 2019	Jul. 31, 2019	May 31, 2016	Sep. 30, 2014	Dec. 31, 2020	Dec. 31, 2019	Jul. 19, 2019	Oct. 31, 2015
Warrant
Number of Underlying Shares
Outstanding, beginning balance (in shares)						14,653,846	11,517,696
Dilution adjustment (in shares)							168,669
Expired (in shares)							(5,686,365)
Exercised (in shares)						(8,500,000)
Outstanding, end balance (in shares)						17,403,846	14,653,846
Weighted Average Exercise Price Per Share
Outstanding, beginning balance (in dollars per share)						$ 0.39	$ 0.81
Dilution adjustment (in dollars per share)							0.80
Expired during period (in dollar per share)							0.80
Exercised during period (in dollar per share)						0.30
Outstanding, end balance (in dollars per share)						$ 0.38	$ 0.39
2014 Warrants
Number of Underlying Shares
Outstanding, beginning balance (in shares)						4,746,000
Dilution adjustment (in shares)						940,365
Expired (in shares)	5,686,365
Outstanding, end balance (in shares)						5,686,365	4,746,000
Weighted Average Exercise Price Per Share
Outstanding, beginning balance (in dollars per share)						$ 1.21
Outstanding, end balance (in dollars per share)						$ 0.80	$ 1.21
May 2016 Warrants
Number of Underlying Shares
Exchanged during period (in shares)							(4,500,000)
Weighted Average Exercise Price Per Share
Exchanged during the period (in dollar per share)							$ 0.75
Series A Warrants
Number of Underlying Shares
Granted (in shares)						7,500,000	8,653,846
Weighted Average Exercise Price Per Share
Granted (in dollars per share)						$ 0.30	$ 0.35
Outstanding, end balance (in dollars per share)		$ 0.33
Expiration term of warrant		5 years
Warrants exercise period		6 months				6 months
Series B Warrants
Number of Underlying Shares
Granted (in shares)						3,750,000
Exchanged during period (in shares)							4,500,000
Weighted Average Exercise Price Per Share
Granted (in dollars per share)						$ 0.30
Exchanged during the period (in dollar per share)							$ 0.35
Outstanding, end balance (in dollars per share)		$ 0.33				$ 0.35
Common shares issuable upon exercise						4,500,000
Sentient
Weighted Average Exercise Price Per Share
Principal amount of loan									$ 5.0
Sentient | 2014 Warrants
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
Registered Offering
Weighted Average Exercise Price Per Share
Common stock issued (in shares)				8,000,000
Sale price (in dollars per shares)				$ 0.50
Gross proceeds from common stock sale				$ 4.0
Registered Offering | 2016 Warrants
Number of Underlying Shares
Outstanding, end balance (in shares)				6,000,000
Weighted Average Exercise Price Per Share
Number of shares of common stock per capital unit (in shares)				0.75
Term of warrants				5 years
LPC Program [Member]
Weighted Average Exercise Price Per Share
Common stock issued (in shares)						900,000	2,113,642
Sale price (in dollars per shares)						$ 0.27	$ 0.28
LPC Program [Member] | May 2016 Warrants
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)		0.75
LPC Program [Member] | Series A Warrants
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)		$ 0.35
Common shares issuable upon exercise		8,653,846
LPC Program [Member] | Series B Warrants
Weighted Average Exercise Price Per Share
Outstanding, end balance (in dollars per share)		$ 0.35
Number of common shares which can be purchased with each warrant								1
Common shares issuable upon exercise		4,500,000
Common Stock | LPC Program [Member]
Weighted Average Exercise Price Per Share
Common stock issued (in shares)		8,653,846	8,653,846