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Note 3 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Accounts Receivable, Allowance for Credit Loss [Table Text Block] |
(In thousands) |  | 2020
Allowance for doubtful accounts, December 31, 2019 |  | $ | 13,136 |
Bad debt expense |  |  | 11,624 |
Write-offs to accounts receivable |  |  | (9,446 | )
Recoveries to accounts receivable |  |  | 169 |
Adjustment to opening retained earnings |  |  | 53 |
Other |  |  | 286 |
Allowance for doubtful accounts, December 31, 2020 |  | $ | 15,822 |

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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