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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] |
Schedule of Quarterly Financial Information | The results of operations for any quarter are not necessarily indicative of the results to be expected for any future period (in thousands of dollars, except for share and per share data):
Quarter Ended |  | March 31 |  | June 30 |  | September 30 |  | December 31
2020: |  |  |  |  |  |  |  |
Total revenues |  | $ | 63,535 |  |  | $ | 50,878 |  |  | $ | 71,944 |  |  | $ | 78,809 |
Gross profit |  | 47,472 |  |  | 35,394 |  |  | 53,712 |  |  | 58,311 |
Net loss |  | (9,065) |  |  | (20,437) |  |  | (4,677) |  |  | (9,651) |
Net loss per common share, basic and diluted |  | $ | (0.34) |  |  | $ | (0.75) |  |  | $ | (0.17) |  |  | $ | (0.33) |
2019: |  |  |  |  |  |  |  |
Total revenues |  | $ | 48,334 |  |  | $ | 52,441 |  |  | $ | 54,673 |  |  | $ | 59,104 |
Gross profit |  | 36,561 |  |  | 39,429 |  |  | 40,888 |  |  | 45,189 |
Net loss |  | (8,250) |  |  | (10,725) |  |  | (18,293) |  |  | (17,300) |
Net loss per common share, basic and diluted |  | $ | (0.34) |  |  | $ | (0.43) |  |  | $ | (0.72) |  |  | $ | (0.65) |
Schedule Revisions Impacts On Quarterly Financial Data | The impact of the revision on the unaudited quarterly financial data is as follows:
Quarter Ended |  | June 30, 2019
|  | As Reported |  | Adjustment |  | As Revised
Total revenues |  | $ | 53,331 |  |  | $ | (890) |  |  | $ | 52,441 |
Gross profit |  | 40,506 |  |  | (1,077) |  |  | 39,429 |
Net loss |  | (11,467) |  |  | 742 |  |  | (10,725) |
Net loss per common share, basic and diluted |  | $ | (0.46) |  |  | $ | 0.03 |  |  | $ | (0.43) |
Quarter Ended |  | March 31, 2019
|  | As Reported |  | Adjustment |  | As Revised
Total revenues |  | $ | 47,214 |  |  | $ | 1,120 |  |  | $ | 48,334 |
Gross profit |  | 35,484 |  |  | 1,077 |  |  | 36,561 |
Net loss |  | (8,019) |  |  | (231) |  |  | (8,250) |
Net loss per common share, basic and diluted |  | $ | (0.33) |  |  | $ | (0.01) |  |  | $ | (0.34) |

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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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