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Note 9 - Concentration of Credit Risk | 3 Months Ended
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Mar. 31, 2019
Notes to Financial Statements |
Concentration Risk Disclosure [Text Block] | Note 9 - Concentration of Credit Risk Concentration of credit risk with respect to trade accounts receivable is generally limited due to the large number of entities comprising the Company's customer base. The Company performs ongoing credit evaluations and provides an allowance for potential credit losses against the portion of accounts receivable which is estimated to be uncollectible. Such losses have historically been within management's expectations. During the three months ended March 31, 2019 and 2018, there were two customers whose purchases represented more than 10% of the Company’s consolidated net sales, respectively. Sales to these customers for the three months ended March 31, 2019 and 2018 are as follows:
|  | Three Months Ended |  |  | Three Months Ended |
|  | March 31, 2019 |  |  | March 31, 2018 |
Customer |  | Net Sales |  |  | % of Net Sales |  |  | Net Sales |  |  | % of Net Sales |
Customer A |  | $ | 3,861,000 |  |  |  | 30.8 | % |  | $ | 4,450,000 |  |  |  | 31.8 | %
Customer B |  | $ | 2,159,000 |  |  |  | 17.2 | % |  | $ | 2,471,000 |  |  |  | 17.7 | %
As of March 31, 2019, the total amounts owed to the Company by these customers were approximately $2,933,000 or 29%, and $2,279,000 or 22%, of the Company’s consolidated net accounts receivable, respectively. The amounts owed at March 31, 2018 by these customers were approximately $3,643,000 or 33%, and $2,657,000 or 24% of the Company’s consolidated net accounts receivable, respectively.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -URI http://asc.fasb.org/topic&trid=2134479 + Details
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