Warrants (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2019

Dec. 31, 2018

Class of Warrant or Right [Line Items]

Schedule of assumptions used to estimate fair value stock warrants granted

	March 31, 2019
Expected dividend yield		0	%
Expected volatility		90	%
Risk-free interest rate		2.40	%
Expected life of options		4.00 years

Schedule of warrant activity

	Number of Warrants		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years		Aggregate Intrinsic Value
Outstanding – December 31, 2018		2,280,000	$	0.72		3.44
Exercisable – December 31, 2018		2,280,000	$	0.72		3.44	$	0.00
Granted		50,000	$	1.06
Forfeited or Expired		0	$	0
Outstanding – March 31, 2018		2,330,000	$	0.73		3.21	$	0
Exercisable – March 31, 2018		2,280,000	$	0.72		3.19	$	1,132,500

	Number of Warrants		Weighted Average Exercise Price per Share		Weighted Average Contractual Life in Years		Aggregate Intrinsic Value
Outstanding – December 31, 2017		2,232,500	$	1.36		4.34
Exercisable – December 31, 2017		2,232,500	$	1.36		4.34	$	0
Granted		0	$	0
Forfeited or Expired		0	$	0
Outstanding – March 31, 2018		2,232,500	$	1.36		4.09	$	0
Exercisable – March 31, 2018		2,232,500	$	1.36		4.09	$	0

Warrant [Member]

Class of Warrant or Right [Line Items]

Schedule of assumptions used to estimate fair value stock warrants granted

	2018
Expected dividend yield		0	%
Expected volatility		91	%
Risk-free interest rate		2.93	%
Expected life of options		4.00 years

	2017
Expected dividend yield		0	%
Expected volatility		80	%
Risk-free interest rate		2.62	%
Expected life of warrants		4-5 years

Schedule of warrant activity

	Number of Warrants			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years		Aggregate Intrinsic Value
Outstanding – December 31, 2016		183,737		$	7.35		2.70
Exercisable – December 31, 2016		171,237		$	7.15		2.79	$	0.00
Granted		2,050,000		$	1.00
Forfeited or Expired		(1,237	)	$	303,37
Outstanding – December 31, 2017		2,232,500		$	1.36		4.34
Exercisable – December 31, 2017		2,232,500		$	1.36		4.34	$	0.00
Granted		100,000		$	1.00
Forfeited or Expired		(52,500	)	$	8.57
Outstanding – December 31, 2018		2,280,000		$	0.72		3.44
Exercisable – December 31, 2018		2,280,000		$	0.72		3.44	$	0.00