Note 18 - Subsequent Events	12 Months Ended
Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events [Text Block]	18. SUBSEQUENT EVENTS Stock Repurchase Program In February 2016, the Board of Directors approved a new stock repurchase program that authorizes the Company to repurchase up to $50.0 million in the aggregate of its common stock through December 31, 2016. 2016 PSUs In February 2016, the Board of Directors granted a total of 349,000 shares to the executive officers and certain non-executive employees, which represent a target number of RSUs to be awarded upon achievement of certain performance conditions. The maximum number of shares that an employee can earn is either 200% or 300% of the target shares. The PSUs contain a purchase price feature, which requires the employees to pay the Company $20 per share upon vesting of the shares. Shares that do not vest will not be subject to the purchase price payment.

Note 18 - Subsequent Events

12 Months Ended

Dec. 31, 2015

18. SUBSEQUENT EVENTS

Stock Repurchase Program

In February 2016, the Board of Directors approved a new stock repurchase program that authorizes the Company to repurchase up to $50.0 million in the aggregate of its common stock through December 31, 2016.

2016 PSUs

In February 2016, the Board of Directors granted a total of 349,000 shares to the executive officers and certain non-executive employees, which represent a target number of RSUs to be awarded upon achievement of certain performance conditions. The maximum number of shares that an employee can earn is either 200% or 300% of the target shares. The PSUs contain a purchase price feature, which requires the employees to pay the Company $20 per share upon vesting of the shares. Shares that do not vest will not be subject to the purchase price payment.