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Unaudited Summarized Quarterly Financial Information (Tables) | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Results of Operations | The following is a summary of the Company’s unaudited quarterly results of operations:
|  | Year Ended December 31, 2020 |  |  | Year Ended December 31, 2019 |
|  | Dec. 31 |  |  | Sept. 30 |  |  | Jun. 30 |  |  | Mar. 31 |  |  | Dec. 31 |  |  | Sept. 30 |  |  | Jun. 30 |  |  | Mar. 31 |
|  | (Amounts and Shares in Thousands, Except Per Share Data) |
Net service revenues |  | $ | 195,996 |  |  | $ | 193,987 |  |  | $ | 184,576 |  |  | $ | 190,216 |  |  | $ | 192,376 |  |  | $ | 168,993 |  |  | $ | 148,915 |  |  | $ | 138,507 |
Gross profit |  |  | 59,104 |  |  |  | 56,301 |  |  |  | 54,997 |  |  |  | 55,835 |  |  |  | 57,542 |  |  |  | 45,176 |  |  |  | 39,693 |  |  |  | 36,827 |
Operating income from continuing operations |  |  | 11,716 |  |  |  | 12,523 |  |  |  | 9,607 |  |  |  | 10,661 |  |  |  | 14,530 |  |  |  | 7,335 |  |  |  | 7,391 |  |  |  | 5,496 |
Net income from continuing operations |  |  | 8,449 |  |  |  | 9,119 |  |  |  | 6,907 |  |  |  | 8,658 |  |  |  | 10,737 |  |  |  | 5,486 |  |  |  | 5,292 |  |  |  | 4,296 |
Loss from discontinued operations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (574 | ) |  |  | — |  |  |  | — |
Net income |  | $ | 8,449 |  |  | $ | 9,119 |  |  | $ | 6,907 |  |  | $ | 8,658 |  |  | $ | 10,737 |  |  | $ | 4,912 |  |  | $ | 5,292 |  |  | $ | 4,296 |
Average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 15,664 |  |  |  | 15,618 |  |  |  | 15,582 |  |  |  | 15,519 |  |  |  | 15,435 |  |  |  | 13,766 |  |  |  | 13,044 |  |  |  | 12,995 |
Diluted |  |  | 16,013 |  |  |  | 15,957 |  |  |  | 15,916 |  |  |  | 15,907 |  |  |  | 15,881 |  |  |  | 14,203 |  |  |  | 13,433 |  |  |  | 13,381 |
Income per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.54 |  |  | $ | 0.58 |  |  | $ | 0.44 |  |  | $ | 0.56 |  |  | $ | 0.70 |  |  | $ | 0.40 |  |  | $ | 0.41 |  |  | $ | 0.33 |
Discontinued operations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (0.04 | ) |  |  | — |  |  |  | — |
Basic net income per share |  | $ | 0.54 |  |  | $ | 0.58 |  |  | $ | 0.44 |  |  | $ | 0.56 |  |  | $ | 0.70 |  |  | $ | 0.36 |  |  | $ | 0.41 |  |  | $ | 0.33 |
Diluted net income per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.53 |  |  | $ | 0.57 |  |  | $ | 0.43 |  |  | $ | 0.54 |  |  | $ | 0.68 |  |  | $ | 0.39 |  |  | $ | 0.39 |  |  | $ | 0.32 |
Discontinued operations |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (0.04 | ) |  |  | — |  |  |  | — |
Diluted net income per share |  | $ | 0.53 |  |  | $ | 0.57 |  |  | $ | 0.43 |  |  | $ | 0.54 |  |  | $ | 0.68 |  |  | $ | 0.35 |  |  | $ | 0.39 |  |  | $ | 0.32 |

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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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