Note 2 - Summary of Significant Accounting Policies (Details Textual) shares in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) shares
Current Year Inflation Rate	4.08%
Change In Present Value Percent	3.25%
Weighted Average Number of Shares Outstanding, Diluted | shares	0	0
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax	$ 0	$ 0
Reclassification of Deferred Tax Liabilities From Other Current Liabilities to Deferred Tax Liabilities, Net [Member] | Accounting Standards Update 2015-17 [Member]
Current Period Reclassification Adjustment	61,710
Reclassification of Deferred Tax Liabilities From Other Current Liabilities to Deferred Tax Liabilities, Net [Member] | Accounting Standards Update 2015-17 [Member] | December 31, 2015 [Member]
Prior Period Reclassification Adjustment	$ 12,487
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Number of Major Customers	2	1
Concentration Risk, Percentage	35.00%	27.00%
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Tax Year 2013 [Member]
Open Tax Year	2013
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Tax Year 2014 [Member]
Open Tax Year	2014
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Tax Year 2015 [Member]
Open Tax Year	2015