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Note 6 - Prepaid Expenses and Other Current Assets (Details) - Prepaid Expenses and Other Current Assets - USD ($)
Sep. 30, 2015
Dec. 31, 2014
Dec. 31, 2013
Prepaid Expenses and Other Current Assets [Abstract]      
Prepaid insurance   $ 116,243 $ 152,812
Prepaid - other   46,471 68,906
Vendor deposits   117,352 95,792
$ 80,061 $ 280,066 [1] $ 317,510
[1] The condensed consolidated balance sheet as of December 31, 2014 has been derived from the audited consolidated financial statements as of that date.