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Note 7 - Concentration of Revenue (Details Textual)	3 Months Ended		6 Months Ended
Note 7 - Concentration of Revenue (Details Textual)	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Percentage Of Consolidated Revenue	10.00%	10.00%	10.00%	10.00%