STOCK PLANS AND STOCK-BASED COMPENSATION (Schedule of Stock Option Activity) (Details) - 2006 Plan [Member]	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Summary of stock options activity
Options Outstanding, Beginning balance | shares	8,100,500
Options Outstanding, Canceled | shares	(1,799,000)
Options Outstanding, Ending balance | shares	6,301,500
Options Outstanding, Weighted Average Exercise Price, Beginning balance	$ 0.07
Options Outstanding, Weighted Average Exercise Price, Canceled	0.11
Options Outstanding, Weighted Average Exercise Price, Ending balance	0.06
Options Outstanding, Weighted Average Fair Value, Beginning balance	$ 0.07
Options Outstanding, Weighted Average Fair Value, Canceled | shares	0.11
Options Outstanding, Weighted Average Fair Value, Ending balance	$ 0.06
Options Outstanding, Weighted Average Remaining Contractual Life, Beginning balance	4 years 9 months 18 days
Options Outstanding, Weighted Average Remaining Contractual Life, Ending balance	4 years 11 months 23 days
Options Exercisable, Beginning balance | shares	8,100,500
Options Exercisable, Ending balance | shares	6,301,500
Options Exercisable, Weighted Average Exercise Price, Beginning balance	$ 0.07
Options Exercisable, Weighted Average Exercise Price, Ending balance	0.06
Options Exercisable, Weighted Average Fair Value, Beginning balance	0.07
Options Exercisable, Weighted Average Fair Value, Ending balance	$ 0.06
Options Exercisable, Weighted Average Remaining Contractual Life, Beginning balance	4 years 9 months 18 days
Options Exercisable, Weighted Average Remaining Contractual Life, Ending balance	4 years 11 months 23 days