7. COMMON STOCK (Details - Nonvested options activity) - Stock Options [Member] - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Number of Nonvested Shares
Number of Nonvested Shares Outstanding, Beginning	2,039,400	2,707,327
Number of Nonvested Shares Granted	500,000	0
Number of Nonvested Shares Forfeited/Expired	(144,200)	(57,727)
Number of Nonvested Shares Vested	(603,600)	(610,200)
Number of Nonvested Shares Outstanding, Ending	1,791,600	2,039,400
Weighted Average Exercise Price
Weighted Average Exercise Price Outstanding, Beginning	$ 2.01	$ 2.00
Weighted Average Exercise Price Granted	3.87
Weighted Average Exercise Price Forfeited/Expired	2.91	2.40
Weighted Average Exercise Price Vested	1.91	1.91
Weighted Average Exercise Price Outstanding, Ending	$ 2.49	$ 2.01