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Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Years Ended December 31, |
|  | 2020 |  |  | 2019 |
Numerator: |  |  |  |  |  |  |  |
Net earnings (loss) |  | $ | 12,795 |  |  | $ | (8,743 | )
Less dividends declared: |  |  |  |  |  |  |  |
Class A |  |  | 515 |  |  |  | 518 |
Class B |  |  | 2,852 |  |  |  | 2,834 |
Undistributed earnings (loss) |  | $ | 9,428 |  |  | $ | (12,095 | )
Undistributed earnings (loss) allocation: |  |  |  |  |  |  |  |
Class A undistributed earnings (loss) |  | $ | 1,574 |  |  | $ | (2,049 | )
Class B undistributed earnings (loss) |  |  | 7,854 |  |  |  | (10,046 | )
Total undistributed earnings (loss) |  | $ | 9,428 |  |  | $ | (12,095 | )
Net earnings (loss) allocation: |  |  |  |  |  |  |  |
Class A net earnings (loss) |  | $ | 2,089 |  |  | $ | (1,531 | )
Class B net earnings (loss) |  |  | 10,706 |  |  |  | (7,212 | )
Net earnings (loss) |  | $ | 12,795 |  |  | $ | (8,743 | )
Denominator: |  |  |  |  |  |  |  |
Weighted average shares outstanding: |  |  |  |  |  |  |  |
Class A |  |  | 2,145 |  |  |  | 2,167 |
Class B |  |  | 10,185 |  |  |  | 10,117 |
Net earnings (loss) per share: |  |  |  |  |  |  |  |
Class A |  | $ | 0.97 |  |  | $ | (0.71 | )
Class B |  | $ | 1.05 |  |  | $ | (0.71 | )

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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