Note 10 - Significant Customers

6 Months Ended

Jun. 30, 2018

Notes to Financial Statements

Concentration Risk Disclosure [Text Block]

10. Significant Customers

The Company had

one

customer that represented

31%

of revenue for the

six

months ended

June 30, 2018

and

34%

for the comparable period in

2017.

The Company had

one

customer that represented

17%

of the total accounts receivable balance as of

June 30, 2018

and

23%

of the total accounts receivable balance as of

December 31, 2017.