L. SHARE-BASED COMPENSATION - SHARE-BASED COMPENSATION EXPENSE 1 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Total share-based compensation expense	$ 3,833	$ 2,120	$ 2,061
Employee Stock Option [Member]
Total share-based compensation expense	1,460	1,538	1,660
Restricted stock units
Total share-based compensation expense	2,373	582	385
Warrants [Member]
Total share-based compensation expense			16
Cost of sales [Member]
Total share-based compensation expense	190	70	88
Research and development [Member]
Total share-based compensation expense	591	230	115
Sales and marketing [Member]
Total share-based compensation expense	357	217	98
General and administrative [Member]
Total share-based compensation expense	$ 2,695	$ 1,603	$ 1,760