Warrants Disclosure (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Jul. 31, 2018 USD ($) Measurement_Input shares	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 26, 2016 USD ($) Measurement_Input $ / shares shares
Comcast Product Supply Agreement [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding | shares					781,617
Comcast Product Supply Agreement [Member] | Measurement Input, Price Volatility [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input	0.029
Comcast Product Supply Agreement [Member] | Measurement Input, Expected Dividend Rate [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input	0.000				0
Comcast Product Supply Agreement [Member] | Measurement Input, Expected Term [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Term	5 years 2 months 12 days
Comcast Product Supply Agreement [Member] | Measurement Input, Risk Free Interest Rate [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input	0.45
Comcast Milestones Achievement [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares					7,816,162
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares		$ 4.76			$ 4.76
Comcast Warrant Vesting Tranche September 26, 2016 [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding | $					$ 1.6
Comcast Warrant Vesting Tranche September 26, 2016 [Member] | Measurement Input, Price Volatility [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					0.014
Comcast Warrant Vesting Tranche September 26, 2016 [Member] | Measurement Input, Expected Dividend Rate [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					0.000
Comcast Warrant Vesting Tranche September 26, 2016 [Member] | Measurement Input, Expected Term [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Term					7 years
Comcast Warrant Vesting Tranche September 26, 2016 [Member] | Measurement Input, Risk Free Interest Rate [Member]
Class of Warrant or Right [Line Items]
Warrants and Rights Outstanding, Measurement Input					0.42
Comcast Warrant Vesting Tranche July 31, 2018 [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Outstanding | shares	1,172,425
Class of Warrant or Right, Unissued | shares					1,172,425
Issuance of Stock and Warrants for Services or Claims | $	$ 2.3
Sales Revenue, Goods, Net [Member] | Comcast Product Supply Agreement [Member]
Class of Warrant or Right [Line Items]
Reduction to Net Revenues in connection with amortization of the Warrant | $		$ 1.2	$ 0.2	$ 0.4