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Note 6 - Concentration of Revenue (Tables)

3 Months Ended

Mar. 31, 2014

Risks and Uncertainties [Abstract]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

		Three Months Ended March 31,
(unaudited)		2014				2013
ChemFree Customer A			17	%			13	%
ChemFree Customer B			20	%			30	%
ChemFree Customer C			2	%			10	%
ChemFree Customer D			11	%			9	%

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Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.

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