Note 5 - Accounts Receivable and Customer Concentrations

12 Months Ended

Dec. 31, 2016

Notes to Financial Statements

Loans, Notes, Trade and Other Receivables Disclosure [Text Block]

5. ACCOUNTS RECEIVABLE and customer concentrations

At

December

31,

2016

and

2015,

our allowance for doubtful accounts amounted to

$15,000

and

$0,

respectively. Net charges against the allowance for doubtful accounts were

$

0

in both

2016

and

2015.

The following table indicates the percentage of consolidated revenue from continuing operations and year-end accounts receivable represented by each customer that represented more than

10

percent of consolidated revenue from continuing operations or year-end accounts receivable.

	Revenue						Accounts Receivable
	2016			2015			2016			2015
Customer A		13.2	%		22.5	%		14.2	%		23.6	%
Customer B		28.5	%		2.0	%		52.2	%		28.9	%
Customer C		10.3	%		18.7	%		5.2	%		6.4	%
Customer D		3.6	%		3.9	%		3.2	%		11.6	%

Subsequent to

December

31,

2016,

Customer B remitted payments totaling approximately

$547,000

in

January

2017

for a total payment of

79%

of their year-end accounts receivable balance.