Note 7 - Concentration of Revenue (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

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

	Three Months Ended March 31 ,
	2018		201 7
Customer A		11.1%		11.6%
Customer B		5.5%		13.6%
Customer C		7.5%		15.2%
Customer D		20.3%		14.5%
Customer E		27.3%		−%