Organization And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)		3 Months Ended		9 Months Ended
	Dec. 22, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Potentially dilutive common stock equivalents excluded from diluted earnings per share				993,335	0
Accrued sales allowances recovered				$ 1,749	$ 47,741
Accrual of credits on account of pontential warranty claims and various other expenses		$ 437,915		437,915		$ 600,622
Changes in income tax rate description	<p style="margin: 0"><font style="font: 10pt Times New Roman, Times, Serif">On December 22, 2017, President Trump signed into law the legislation generally known as Tax Cut and Jobs Act of 2017. The tax law includes significant changes to the U.S. corporate tax systems including a rate reduction from 35% to 21% beginning in January of 2018, a change in the treatment of foreign earnings going forward and a deemed repatriation transition tax.</font></p>
Accounts Payable And Accrued Liabilities [Member]
Accrual of credits on account of pontential warranty claims and various other expenses		437,915		437,915		$ 600,622
Sales and Marketing Expenses [Member]
Advertising and promotion expense		0	$ 67,497	77,650	180,743
Shipping and handling costs		$ 14,680	$ 48,952	$ 48,538	$ 95,290