11. Share-Based Compensation (Details-Share based compensation expense) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Employee stock-based compensation expense	$ 516	$ 489
Employee Stock Option [Member]
Employee stock-based compensation expense	385	414
Restricted Stock Units/Awards
Employee stock-based compensation expense	131	73
Warrant [Member]
Employee stock-based compensation expense	0	2
Cost of sales [Member]
Employee stock-based compensation expense	16	25
Research and development [Member]
Employee stock-based compensation expense	53	25
Sales and marketing [Member]
Employee stock-based compensation expense	50	23
General and administrative [Member]
Employee stock-based compensation expense	$ 397	$ 416