Note 1 - Business and Summary of Significant Accounting Policies (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Number of Businesses	1
Increase to Net Cash From Operations and Net Cash Used in Financing [Member] | Quarter Ended March 31, 2016 [Member] | Accounting Standards Update 2016-09 [Member]
Prior Period Reclassification Adjustment	$ 10
Decrease to Total Current Assets and Total Long-term Liabilities [Member] | Year Ended December 31, 2016 [Member]
Prior Period Reclassification Adjustment	$ 7,500