(6) Earnings Per Share (Details - Earnings Per Share) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings per share:
Weighted average number of common shares outstanding during the period used to compute basic earnings per share	22,685	22,362	22,612	22,302
Incremental common shares attributable to exercise of outstanding options and warrants	1,002	1,616	1,171	1,817
Weighted average number of common shares used to compute diluted earnings per share	23,687	23,978	23,783	24,119