(6) Earnings Per Share (Details - Earnings Per Share) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings per share:
Weighted average number of common shares outstanding during the period used to compute basic earnings per share	22,666	22,526	22,630	22,378
Incremental common shares attributable to exercise of outstanding options and warrants	1,242	1,540	1,195	1,724
Weighted average number of common shares used to compute diluted earnings per share	23,908	24,066	23,825	24,102