Note 6 - Concentration of Revenue (Tables)

6 Months Ended

Jun. 30, 2013

Risks and Uncertainties [Abstract]

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

	Three Months Ended June 30,				Six Months Ended June 30,
(unaudited)	2013		2012		2013		2012
ChemFree Customer A		20%		29%		25%		29%
ChemFree Customer B		12%		14%		12%		14%
ChemFree Customer C		11%		--		11%		--