Warrants (Details 1) - USD ($)
|
3 Months Ended |
12 Months Ended |
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Number of Warrants |
|
|
|
|
|
| Outstanding - Beginning Balance |
2,280,000
|
2,232,500
|
2,232,500
|
|
|
| Exercisable - Beginning Balance |
2,280,000
|
2,232,500
|
2,232,500
|
|
|
| Granted |
50,000
|
0
|
|
|
|
| Forfeited or Expired |
0
|
0
|
|
|
|
| Outstanding - Ending Balance |
2,330,000
|
2,232,500
|
2,280,000
|
2,232,500
|
|
| Exercisable - Ending Balance |
2,280,000
|
2,232,500
|
2,280,000
|
2,232,500
|
|
| Weighted Average Exercise Price per Share |
|
|
|
|
|
| Outstanding - Beginning Balance |
$ 0.72
|
$ 1.36
|
$ 1.36
|
|
|
| Exercisable - Beginning Balance |
0.72
|
1.36
|
1.36
|
|
|
| Granted |
1.06
|
0
|
|
|
|
| Weighted Average Exercise Price per Share, Forfeited or Expired |
0
|
0
|
|
|
|
| Outstanding - Ending Balance |
0.73
|
1.36
|
0.72
|
$ 1.36
|
|
| Exercisable - Ending Balance |
$ 0.72
|
$ 1.36
|
$ 0.72
|
$ 1.36
|
|
| Weighted Average Contractual Life in Years |
|
|
|
|
|
| Outstanding |
3 years 2 months 16 days
|
4 years 1 month 2 days
|
|
|
|
| Exercisable |
3 years 2 months 8 days
|
4 years 1 month 2 days
|
|
|
|
| Aggregate Intrinsic Value |
|
|
|
|
|
| Exercisable - Beginning Balance |
$ 0
|
|
|
|
|
| Exercisable - Ending Balance |
$ 1,132,500
|
|
|
|
|
| Warrant [Member] |
|
|
|
|
|
| Number of Warrants |
|
|
|
|
|
| Outstanding - Beginning Balance |
2,280,000
|
2,232,500
|
2,232,500
|
183,737
|
|
| Exercisable - Beginning Balance |
2,280,000
|
2,232,500
|
2,232,500
|
171,237
|
|
| Granted |
|
|
100,000
|
2,050,000
|
|
| Forfeited or Expired |
|
|
(52,500)
|
(1,237)
|
|
| Outstanding - Ending Balance |
|
|
2,280,000
|
2,232,500
|
183,737
|
| Exercisable - Ending Balance |
|
|
2,280,000
|
2,232,500
|
171,237
|
| Weighted Average Exercise Price per Share |
|
|
|
|
|
| Outstanding - Beginning Balance |
$ 0.72
|
$ 1.36
|
$ 1.36
|
$ 7.35
|
|
| Exercisable - Beginning Balance |
$ 0.72
|
$ 1.36
|
1.36
|
7.15
|
|
| Granted |
|
|
1.00
|
1.00
|
|
| Weighted Average Exercise Price per Share, Forfeited or Expired |
|
|
8.57
|
303.37
|
|
| Outstanding - Ending Balance |
|
|
0.72
|
1.36
|
$ 7.35
|
| Exercisable - Ending Balance |
|
|
$ 0.72
|
$ 1.36
|
$ 7.15
|
| Weighted Average Contractual Life in Years |
|
|
|
|
|
| Outstanding |
|
|
3 years 5 months 9 days
|
4 years 4 months 2 days
|
2 years 8 months 12 days
|
| Exercisable |
|
|
3 years 5 months 9 days
|
4 years 4 months 2 days
|
2 years 9 months 14 days
|
| Aggregate Intrinsic Value |
|
|
|
|
|
| Exercisable - Beginning Balance |
$ 0
|
$ 0
|
$ 0
|
$ 0
|
|