Note 8 - Term Loans, Revolving Line of Credit and Warrants - Debt Discount (Details) (Parentheticals)	Apr. 27, 2017 shares
PFG Loan [Member]
Common stock issued to lender (in shares)	190,000

Number of new stock issued during the period.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration