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Note 4 - Accounts Receivable and Customer Concentrations | 12 Months Ended
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Dec. 31, 2020
Notes to Financial Statements |
Loans, Notes, Trade and Other Receivables Disclosure [Text Block] |
4. | ACCOUNTS RECEIVABLE and customer concentrations
At December 31, 2020 and 2019, our allowance for doubtful accounts was $0 . There were no charges against the allowance for doubtful accounts in 2020 or 2019. 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 |
|  | 20 20 |  |  | 201 9 |  |  | 20 20 |  |  | 201 9 |
Customer A |  |  | 69 | % |  |  |  | 60 | % |  |  |  | 59 | % |  |  |  | 80 | % |
Customer B |  |  | 2 | % |  |  |  | 11 | % |  |  |  | 10 | % |  |  |  | 11 | % |
Customer C |  |  | 10 | % |  |  |  | 6 | % |  |  |  | 6 | % |  |  |  | 2 | % |

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- References No definition available. + Details
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- 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. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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