1. Stock-based Compensation (Details - Option activity) - Options [Member] shares in Thousands	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Number of Shares
Options outstanding at the beginning of period	15,348
Granted	0
Exercised	(28)
Forfeited/Expired	0
Options outstanding at the end of period	15,320
Options exercisable at the end of period	11,844
Weighted Average Exercise Price
Options outstanding at the beginning of period | $ / shares	$ 4.59
Exercised | $ / shares	1.73
Options outstanding at the end of period | $ / shares	4.59
Options exercisable at the end of period | $ / shares	$ 4.86
Weighted Average Remaining Contractual Term
Weighted average remaining contractual term, end of period	3 years 1 month 6 days
Weighted average remaining contractual term, exercisable at the end of period	2 years 6 months