11. Share-Based Compensation (Details-Option activity) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Number of Shares
Outstanding, beginning balance	1,423,000
Exercised	(11,000)
Forfeited	(16,000)
Outstanding, ending balance	1,396,000
Exericsable, ending balance	687,000
Vested and expected to vest	1,326,000
Weighted Average Exercise Price
Outstanding, beginning balance	$ 8.96
Exercised	$ 7.05
Forfeited	$ 9.93
Outstanding, ending balance	$ 8.96
Exericsable, ending balance	$ 8.20
Vested and expected to vest	$ 8.91
Weighted Average Fair Value
Outstanding, beginning balance	$ 4.48
Exercised	$ 3.59
Forfeited	$ 5.32
Outstanding, ending balance	$ 4.47
Exericsable, ending balance	$ 3.69
Vested and expected to vest	$ 4.43
Weighted Average Remaining Contractual Life
Outstanding, ending balance	7 years 10 months 7 days
Exericsable, ending balance	7 years 4 months 9 days
Vested and expected to vest	7 years 9 months 27 days
Aggregate intrinsic value, outstanding	$ 3,486
Exercised	50
Forfeited	22
Aggregate intrinsic value, outstanding	6,869
Exericsable, ending balance	3,905
Vested and expected to vest	$ 6,592