Note 5 - Accounts Receivable and Customer Concentrations (Tables)

12 Months Ended

Dec. 31, 2015

Notes Tables

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

	Revenue						Accounts Receivable
	2015			2014			2015			2014
Customer A		22.5	%		24.7	%		23.6	%		37.1	%
Customer B		18.7	%		12.7	%		6.4	%		--
Customer C		2.0	%		--			28.9	%		--
Customer D		3.9	%		6.2	%		11.6	%		15.4	%