UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Allowance for doubtful accounts receivable (in dollars)	$ 1,514	$ 1,751
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	20,000	20,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	120,000	120,000
Common stock, shares outstanding	56,351	55,971
Treasury stock, shares	908	826
Term loan current
Term loan, discount (in dollars)	$ 1,806	$ 1,784
Term loan noncurrent
Term loan, discount (in dollars)	$ 5,243	$ 5,703