L. Share-Based Compensation (Details-Option Activity) - Employee Stock Options [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Number of Shares
Outstanding, beginning balance	1,423,000	1,468,000	419,000
Granted	0	108,000	1,099,000
Exercised	(81,000)	(104,000)	(29,000)
Forfeited	(32,000)	(48,000)	(16,000)
Expired	0	(1,000)	(5,000)
Outstanding, ending balance	1,310,000	1,423,000	1,468,000
Exericsable, ending balance	766,000
Vested and expected to vest	1,274,000
Weighted Average Exercise Price
Outstanding, beginning balance	$ 8.96	$ 8.38	$ 5.94
Granted	0	13.84	9.21
Exercised	8.96	6.22	5.87
Forfeited	7.09	8.23	7.10
Expired	0	6.21	5.99
Outstanding, ending balance	9.07	8.96	8.38
Exericsable, ending balance	8.54
Vested and expected to vest	9.04
Weighted Average Share Price on Date of Exercise	16.53
Weighted Average Fair Value
Outstanding, beginning balance	4.48	4.17
Granted	0	7.24
Exercised	2.62	2.57
Forfeited	4.43	5.43
Expired	0	2.21
Outstanding, ending balance	4.59	$ 4.48	$ 4.17
Exericsable, ending balance	4.12
Vested and expected to vest	$ 4.57
Weighted Average Remaining Contractual Life
Outstanding, ending balance	7 years 2 months 7 days
Exericsable, ending balance	6 years 10 months 17 days
Vested and expected to vest	7 years 2 months 2 days
Aggregate Intrinsic Value
Aggregate intrinsic value, beginning balance	$ 3,486	$ 9,731	$ 0
Granted	0	0
Exercised	762	1,476	$ 178
Forfeited	$ 212	628
Expired		11
Aggregate intrinsic value, ending balance	$ 10,598	$ 3,486	$ 9,731
Exericsable, ending balance	6,606
Vested and expected to vest	$ 10,346