9. Industry Segment and Geographic Information (Details - Geographic area) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 32,372	$ 37,381	$ 37,655	$ 38,324	$ 32,693	$ 36,625	$ 35,025	$ 36,419	$ 145,733	$ 140,762	$ 131,993
U S
Segment Reporting Information [Line Items]
Revenues									94,840	81,971	75,997
Canada
Segment Reporting Information [Line Items]
Revenues									2,062	11,655	15,114
Other Countries [Member]
Segment Reporting Information [Line Items]
Revenues									$ 48,830	$ 47,136	$ 40,882