Note 7 - Concentration of Revenue (Tables)

6 Months Ended

Jun. 30, 2012

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

	Three Months Ended June 30,						Six Months Ended June 30,
(unaudited)	2012			2011			2012			2011
ChemFree Customer A		29	%		27	%		29	%		30	%
ChemFree Customer B		14	%		13	%		14	%		12	%