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Note 4 - Accounts Receivable | 12 Months Ended
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Dec. 31, 2020
Notes to Financial Statements |
Accounts and Nontrade Receivable [Text Block] | 4. Accounts Receivable: Accounts receivable, net consisted of the following at December 31:
|  | 2020 |  |  | 2019 |
Billed receivables |  | $ | 380.5 |  |  | $ | 372.7 |
Unbilled receivables |  |  | 69.6 |  |  |  | 80.6 |
Total receivables |  |  | 450.1 |  |  |  | 453.3 |
Less allowance for doubtful accounts |  |  | (17.7 | ) |  |  | (11.7 | )
Accounts receivable, net |  | $ | 432.4 |  |  | $ | 441.6 |

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- Definition The entire disclosure for accounts receivable, contract receivable, receivable held-for-sale, and nontrade receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -URI http://asc.fasb.org/topic&trid=2196771 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -URI http://asc.fasb.org/topic&trid=82887179 + Details
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