Schedule of Other Stock Options Issued (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding, beginning of year	3,611,850	4,303,900
Options exercised	(383,350)	(31,276)
Options expired	(20,000)	(765,000)
Options outstanding, end of year	3,516,225	3,611,850
Other Options Issued [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding, beginning of year	265,000	625,000
Options issued	90,000	265,000
Options exercised	(10,625)
Options expired		(625,000)
Options outstanding, end of year	344,375	265,000