Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Sales Revenue, Services, Net [Member]
Concentration Risk, Percentage	17.40%	15.50%	13.10%
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 0
Percentage of Net Property, Plant, and Equipment Accounted for Under ASC980	76.50%	75.30%
Deferred Revenue	$ 681	$ 734