Note 5 - Accounts Receivable and Customer Concentrations

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

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

5. ACCOUNTS RECEIVABLE and customer concentrations

At December 31, 2014 and 2013, our allowance for doubtful accounts amounted to $13,000 and $16,000, respectively. Net charges against the allowance for doubtful accounts were $12,000 and $4,000 in 2014 and 2013, respectively.

The following table indicates the percentage of consolidated revenue and year-end accounts receivable represented by each customer that represented more than 10 percent of consolidated revenue or year-end accounts receivable.

	Revenue						Accounts Receivable
	2014			2013			2014			2013
ChemFree
Customer A		16	%		18	%		20	%		17	%
Customer B		9	%		8	%		12	%		15	%
Customer C		21	%		21	%		15	%		18	%
CoreCard
Customer D		7	%		6	%		10	%		10	%