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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information | Selected quarterly financial data for 2020 and 2019 is as follows (in thousands, except per share amounts):
| Quarter Ended
| March 31, 2020 |  | June 30, 2020 |  | September 30, 2020 |  | December 31, 2020
Revenue | $ | 53,764 |  |  | $ | 52,500 |  |  | $ | 56,608 |  |  | $ | 62,655 |
Gross profit | $ | 41,622 |  |  | $ | 41,078 |  |  | $ | 43,485 |  |  | $ | 49,194 |
Net income (loss) | $ | (297) |  |  | $ | 3,808 |  |  | $ | 6,464 |  |  | $ | 7,841 |
Net income (loss) per share - basic | $ | — |  |  | $ | 0.05 |  |  | $ | 0.08 |  |  | $ | 0.10 |
Net income (loss) per share - diluted | $ | — |  |  | $ | 0.05 |  |  | $ | 0.08 |  |  | $ | 0.10 |
| Quarter Ended
| March 31, 2019 |  | June 30, 2019 |  | September 30, 2019 |  | December 31, 2019
Revenue | $ | 50,290 |  |  | $ | 49,189 |  |  | $ | 52,833 |  |  | $ | 60,316 |
Gross profit | $ | 38,040 |  |  | $ | 37,918 |  |  | $ | 40,913 |  |  | $ | 46,876 |
Net income (loss) | $ | (12,272) |  |  | $ | (5,771) |  |  | $ | 173 |  |  | $ | 51 |
Net income (loss) per share - basic | $ | (0.16) |  |  | $ | (0.08) |  |  | $ | — |  |  | $ | — |
Net income (loss) per share - diluted | $ | (0.16) |  |  | $ | (0.08) |  |  | $ | — |  |  | $ | — |

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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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