Schedule of Other Stock Options Issued (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding, beginning of year	4,303,900	5,040,450
Options expired	(765,000)	(1,016,870)
Options outstanding, end of year	3,611,850	4,303,900
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 issued	265,000	0
Options expired	(625,000)	0
Options outstanding, end of year	265,000	625,000