Schedule of 2010 Non-Qualified Stock Option Plan (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 granted	474,750	649,850
Options outstanding, end of year	3,516,225	3,611,850
2010 Non-Qualified Stock Option Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options outstanding, beginning of year	975,000	915,000
Options granted	125,000	60,000
Options outstanding, end of year	1,100,000	975,000