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Note 17 - Segment Reporting - Summary of Valuation and Qualifying Accounts (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Balance at beginning of period $ 122,095 $ 125,766
Charged to (recovered) costs and expenses 42,050 (3,671)
Balance at end of period $ 164,145 $ 122,095