Schedule of Share-based Compensation, Stock Options, and Warrants or Rights Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.74	$ 0.82
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	4,404,818
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	5 years 9 months 29 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.69
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value, Beginning of Period	$ 43,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	2,843,659
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.66
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value, Beginning of Period	$ 43,500
Range 1 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.41
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	325,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	1 month 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.03
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	325,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.05
Range 2 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.53
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	125,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	11 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	125,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.02
Range 3 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.58
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	675,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	2 months 27 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.09
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	675,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.14
Range 4 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.62
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	200,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	22 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.03
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	200,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.04
Range 5 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.66
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	275,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	6 months 29 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.04
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	68,750
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.02
Range 6 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.70
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	475,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	5 months 5 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.08
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.00
Range 7 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.73
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	600,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	11 months 27 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.10
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.15
Range 8 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.76
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	945,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	1 year 11 months 23 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.16
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	345,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.09
Range 9 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.77
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	359,818
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	8 months 16 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.06
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	179,909
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.05
Range 10 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.78
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	100,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	22 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0
Range 11 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	25,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	25,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.01
Range 12 [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 0.89
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period	300,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term	6 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period	$ 0.06
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, Beginning of Period	300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, Beginning of Period	$ 0.09