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Note 5 - Accounts Receivable, Notes Receivable and Customer Concentrations

12 Months Ended

Dec. 31, 2013

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

5. ACCOUNTS RECEIVABLE, NOTES RECEIVABLE and customer concentrations

At December 31, 2013 and 2012, our allowance for doubtful accounts amounted to $16,000 and $14,000, respectively. Net charges against the allowance for doubtful accounts were $4,000 and $1,000 in 2013 and 2012, 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
	2013			2012			2013			2012
*ChemFree*
Customer A		18	%		13	%		17	%		13	%
Customer B		8	%		7	%		15	%		14	%
Customer C		21	%		27	%		18	%		20	%
Customer D		7	%		10	%		5	%		12	%

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

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