L. Share-Based Compensation (Details-Share-based Compensation by expense type) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Total share-based compensation expense	$ 2,120	$ 2,061	$ 1,069
Cost of goods sold [Member]
Total share-based compensation expense	70	88	56
Research and development [Member]
Total share-based compensation expense	230	115	53
Sales and marketing [Member]
Total share-based compensation expense	217	98	52
General and administrative [Member]
Total share-based compensation expense	$ 1,603	$ 1,760	$ 908