ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule Of Changes In Reserve) (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance at beginning of the year	$ (77,102)	$ (263,092)
Reclassification of allowance from accounts receivable to accounts payable and accrued liabilities	77,102	173,426
Expenditures		12,564
Balance at year-end		$ (77,102)