Warrants - Schedule of Activities of Warrants (Details) - Equity classified warrants - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Number of shares
Outstanding and exercisable, beginning balance, shares	7,500,000
Warrants exercised, shares	2,096
Warrants expired, shares	(3,747,904)
Outstanding and exercisable, ending balance, shares	3,750,000	7,500,000
Weighted average exercise price
Outstanding and exercisable, beginning balance (usd per share)	$ 10.80
Warrants exercised (usd per share)	9.60
Warrants expired (usd per share)	9.60
Outstanding and exercisable, ending balance (usd per share)	$ 12.00	$ 10.80
Weighted average remaining life
Outstanding and exercisable	4 years 1 month 17 days	2 years 10 months