Schedule of Other Stock Options Issued (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding, beginning of year	5,169,200	2,175,000
Options granted	50,000	3,259,200
Options forfeited	(168,750)	(205,000)
Options outstanding, end of year	5,040,450	5,169,200
Other Options Issued [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding, beginning of year	625,000	625,000
Options granted	0	0	625,000
Options forfeited	0	0
Options outstanding, end of year	625,000	625,000