Note 10 - Fair Value Measurements (Details) - Financial Instruments, Assets and Liabilities Measured at Fair Value (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Note 10 - Fair Value Measurements (Details) - Financial Instruments, Assets and Liabilities Measured at Fair Value [Line Items]
Money market accounts	$ 80,621	$ 78,633
Available for sale equity securities	2,264	2,302
Derivatives	178	163
Total	83,063	81,098
Long term contingent consideration	47,800	34,800
Fair Value, Inputs, Level 1 [Member]
Note 10 - Fair Value Measurements (Details) - Financial Instruments, Assets and Liabilities Measured at Fair Value [Line Items]
Money market accounts	80,621	78,633
Available for sale equity securities	1,399	1,470
Total	82,020	80,103
Fair Value, Inputs, Level 2 [Member]
Note 10 - Fair Value Measurements (Details) - Financial Instruments, Assets and Liabilities Measured at Fair Value [Line Items]
Available for sale equity securities	865	832
Derivatives	178	163
Total	1,043	995
Fair Value, Inputs, Level 3 [Member]
Note 10 - Fair Value Measurements (Details) - Financial Instruments, Assets and Liabilities Measured at Fair Value [Line Items]
Long term contingent consideration	$ 47,800	$ 34,800