Note 6 - Concentration of Revenue (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

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

	Three Months Ended March 31 ,
	201 7		201 6
Customer A		11.6%		23.1%
Customer B		13.6%		1.9%
Customer C		15.2%		9.4%
Customer D		14.5%		14.7%