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Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Data | The following is a summary of quarterly financial data for the years ended December 31, 2020 and 2019:
(in thousands, except for per share amounts) | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
Year Ended December 31, 2020 |  |  |  |  |  |  |
Revenues | $ | 58,000 |  |  | $ | 62,207 |  |  | $ | 60,308 |  |  | $ | 67,653 |
Gross profit (1) | 52,423 |  |  | 55,991 |  |  | 54,041 |  |  | 60,871 |
Income (loss) from operations | (125) |  |  | 9,171 |  |  | 7,742 |  |  | 10,451 |
Net income | 486 |  |  | 8,714 |  |  | 5,947 |  |  | 8,190 |
Net income per share, basic | $ | 0.01 |  |  | $ | 0.16 |  |  | $ | 0.11 |  |  | $ | 0.15 |
Net income per share, diluted | $ | 0.01 |  |  | $ | 0.16 |  |  | $ | 0.11 |  |  | $ | 0.15 |
Year Ended December 31, 2019 |  |  |  |  |  |  |
Revenues | $ | 47,713 |  |  | $ | 59,060 |  |  | $ | 59,485 |  |  | $ | 60,930 |
Gross profit (1) | 42,220 |  |  | 52,313 |  |  | 52,327 |  |  | 54,335 |
Income (loss) from operations | (2,087) |  |  | 9,895 |  |  | 10,759 |  |  | 4,243 |
Net income (loss) | (612) |  |  | 11,526 |  |  | 100,423 |  |  | 4,216 |
Net income (loss) per share, basic | $ | (0.01) |  |  | $ | 0.22 |  |  | $ | 1.88 |  |  | $ | 0.08 |
Net income (loss) per share, diluted | $ | (0.01) |  |  | $ | 0.21 |  |  | $ | 1.84 |  |  | $ | 0.08 |
(1)Gross profit includes revenues less cost of goods sold excluding amortization, and less intangible asset amortization.

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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=118952077&loc=d3e1280-108306 + Details
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