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Note 19 - Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Quarterly Financial Information [Table Text Block] |
(U.S. Dollars, in thousands, except per share data) |  | Quarter ended
Year 2020 |  | December 31(4) |  |  | September 30(3) |  |  | June 30(2) |  |  | March 31(1) |
Total revenue |  | $ | 32,688 |  |  | $ | 31,694 |  |  | $ | 30,678 |  |  | $ | 35,397 |
Gross profit |  |  | 16,745 |  |  |  | 17,343 |  |  |  | 13,742 |  |  |  | 21,196 |
Net income (loss) |  | $ | (15,657 | ) |  | $ | (6,411 | ) |  | $ | (7,708 | ) |  | $ | 5,794 |
Basic net income (loss) per share |  | $ | (1.10 | ) |  | $ | (0.45 | ) |  | $ | (0.54 | ) |  | $ | 0.41 |
Diluted net income (loss) per share |  | $ | (1.10 | ) |  | $ | (0.45 | ) |  | $ | (0.54 | ) |  | $ | 0.40 |
Basic common shares outstanding |  |  | 14,275 |  |  |  | 14,205 |  |  |  | 14,199 |  |  |  | 14,202 |
Diluted common shares outstanding |  |  | 14,275 |  |  |  | 14,205 |  |  |  | 14,199 |  |  |  | 14,353 |
(U.S. Dollars, in thousands, except per share data) |  | Quarter ended
Year 20 19 |  | December 31 |  |  | September 30 |  |  | June 30 |  |  | March 31 |
Total revenue |  | $ | 29,772 |  |  | $ | 29,697 |  |  | $ | 30,418 |  |  | $ | 24,723 |
Gross profit |  |  | 21,123 |  |  |  | 23,746 |  |  |  | 23,582 |  |  |  | 17,412 |
Net income |  | $ | 4,051 |  |  | $ | 9,200 |  |  | $ | 9,435 |  |  | $ | 4,507 |
Basic net income per share |  | $ | 0.28 |  |  | $ | 0.65 |  |  | $ | 0.68 |  |  | $ | 0.32 |
Diluted net income per share |  | $ | 0.28 |  |  | $ | 0.66 |  |  | $ | 0.67 |  |  | $ | 0.31 |
Basic common shares outstanding |  |  | 14,280 |  |  |  | 14,070 |  |  |  | 13,916 |  |  |  | 14,185 |
Diluted common shares outstanding |  |  | 14,621 |  |  |  | 14,387 |  |  |  | 14,088 |  |  |  | 14,314 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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