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Note 10 - Concentration of Credit Risk | 9 Months Ended
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Sep. 30, 2021
Notes to Financial Statements |
Concentration Risk Disclosure [Text Block] | Note 10 - 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 and nine months ended September 30, 2021 and 2020, there were two customers whose purchases represented more than 10% of the Company’s consolidated net sales. Sales to these customers for the three and nine months ended September 30, 2021 and 2020 are as follows:
|  | Three Months Ended |  |  | Three Months Ended |
|  | September 30, 2021 |  |  | September 30, 2020 |
Customer |  | Net Sales |  |  | % of Net Sales |  |  | Net Sales |  |  | % of Net Sales |
Customer A |  | $ | 3,304,000 |  |  |  | 53 | % |  | $ | 3,737,000 |  |  |  | 63 | %
Customer B |  | $ | 617,000 |  |  |  | 10 | % |  | $ | - |  |  |  | 0 | %%
|  | Nine Months Ended |  |  | Nine Months Ended |
|  | September 30, 2021 |  |  | September 30, 2020 |
Customer |  | Net Sales |  |  | % of Net Sales |  |  | Net Sales |  |  | % of Net Sales |
Customer A |  | $ | 10,648,000 |  |  |  | 53 | % |  | $ | 8,190,000 |  |  |  | 44 | %
Customer B |  | $ | 2,384,000 |  |  |  | 12 | % |  | $ | 2,912,000 |  |  |  | 16 | %
As of September 30, 2021, the total amounts owed to the Company by these customers were approximately $1,422,000 or 27% of the Company’s consolidated net accounts receivable. The amounts owed at September 30, 2020 by these customers were approximately $2,220,000 or 42% of the Company’s consolidated net accounts receivable.

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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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