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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2023
Summary of Significant Accounting Policies |
Schedule of Product and related sales and RefrigerantSide Services revenues | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Years Ended December 31, |  | 2023 |  | 2022 |  | 2021
(in thousands) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Product and related sales | ​ | $ | 281,954 | ​ | $ | 319,019 | ​ | $ | 187,799
RefrigerantSide ® Services | ​ |  | 7,071 | ​ |  | 6,206 | ​ |  | 4,949
Total | ​ | $ | 289,025 | ​ | $ | 325,225 | ​ | $ | 192,748
Schedule of reconciliation of shares used to determine net income per share | The reconciliation of shares used to determine net income per share is as follows (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years ended December 31,
​ |  | 2023 |  | 2022 |  | 2021
Net income | ​ | $ | 52,247 | ​ | $ | 103,801 | ​ | $ | 32,259
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average number of shares – basic | ​ |  | 45,385,433 | ​ |  | 44,990,104 | ​ |  | 43,765,443
Shares underlying options | ​ |  | 1,952,798 | ​ |  | 2,118,914 | ​ |  | 2,875,379
Weighted average number of shares outstanding – diluted | ​ |  | 47,338,231 | ​ |  | 47,109,018 | ​ |  | 46,640,822

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