Warrants - Schedule of Activities of Warrants (Details) - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Private Placement Warrants
Number of shares
Outstanding and exercisable, beginning balance, shares	10,390
Warrants exercised, shares	0
Outstanding and exercisable, ending balance, shares	10,390	10,390
Weighted average exercise price
Outstanding and exercisable, beginning balance (usd per share)	$ 0.44
Warrants exercised (usd per share)	0.00
Outstanding and exercisable, ending balance (usd per share)	$ 0.43	$ 0.44
Weighted average remaining life
Outstanding and exercisable	2 years 1 month 6 days	2 years 3 months 18 days
Equity classified warrants
Number of shares
Outstanding and exercisable, beginning balance, shares	150,000,000
Warrants exercised, shares	41,923
Outstanding and exercisable, ending balance, shares	149,958,077	150,000,000
Weighted average exercise price
Outstanding and exercisable, beginning balance (usd per share)	$ 0.54
Warrants exercised (usd per share)	0.48
Outstanding and exercisable, ending balance (usd per share)	$ 0.54	$ 0.54
Weighted average remaining life
Outstanding and exercisable	2 years 6 months 2 days	2 years 10 months