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SELECTED QUARTERLY INFORMATION | 12 Months Ended
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Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract] |
SELECTED QUARTERLY INFORMATION (Unaudited) [Text Block] | 16. SELECTED QUARTERLY INFORMATION (Unaudited): The following tables set forth certain data from the Company’s consolidated statements of income for each of the quarters in the years ended December 31, 2020 and 2019. The unaudited quarterly consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements contained herein and include all adjustments that the Company considers necessary for a fair presentation of such information when read in conjunction with the Company’s annual audited consolidated financial statements and notes thereto appearing elsewhere in this report. The operating results for any quarter are not necessarily indicative of the results for any subsequent period or for the entire fiscal year.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Three Months Ended
​ | (unaudited)
​ | Dec. 31, | ​ | Sept. 30, | ​ | June 30, | ​ | Mar. 31, | ​ | Dec. 31, | ​ | Sept. 30, | ​ | June 30, | ​ | Mar. 31,
(In thousands, except per share data) | 2020 |  | 2020 |  | 2020 |  | 2020 |  | 2019(1) |  | 2019 |  | ​ | 2019 |  | 2019
Net revenues | $ | 150,693 | ​ | $ | 121,129 | ​ | $ | 106,832 | ​ | $ | 109,664 | ​ | $ | 114,457 | ​ | $ | 114,159 | ​ | $ | 102,865 | ​ | $ | 89,188
Gross profit |  | 74,005 | ​ |  | 59,569 | ​ |  | 53,536 | ​ |  | 56,480 | ​ |  | 58,225 | ​ |  | 58,131 | ​ |  | 51,572 | ​ |  | 45,474
Net income | $ | 27,278 | ​ | $ | 14,820 | ​ | $ | 13,192 | ​ | $ | 15,886 | ​ | $ | 158,291 | ​ | $ | 17,099 | ​ | $ | 10,845 | ​ | $ | 7,233
Earnings per share (2) |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Basic | $ | 0.46 | ​ | $ | 0.25 | ​ | $ | 0.22 | ​ | $ | 0.27 | ​ | $ | 2.69 | ​ | $ | 0.29 | ​ | $ | 0.19 | ​ | $ | 0.13
Diluted | $ | 0.45 | ​ | $ | 0.24 | ​ | $ | 0.22 | ​ | $ | 0.27 | ​ | $ | 2.64 | ​ | $ | 0.29 | ​ | $ | 0.19 | ​ | $ | 0.13
Shares used in per share calculation (2) |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Basic |  | 59,879 | ​ |  | 59,823 | ​ |  | 59,712 | ​ |  | 59,204 | ​ |  | 58,854 | ​ |  | 58,770 | ​ |  | 58,594 | ​ |  | 57,902
Diluted |  | 61,176 | ​ |  | 60,852 | ​ |  | 60,624 | ​ |  | 60,268 | ​ |  | 60,010 | ​ |  | 59,732 | ​ |  | 59,404 | ​ |  | 58,892
(1) | In October 2019, the Company entered into a favorable litigation settlement with ON Semiconductor Corporation which resulted in a $169.0 million net gain.
(2) | In July 2020, the Company’s board of directors approved a two-for-one stock split in the form of a stock dividend, payable on August 18, 2020, to stockholders of record as of the close of business on August 14, 2020. The Company’s stockholders received one additional share of common stock for each share of common stock held on August 14, 2020. The share and per share information for all periods presented in this Form 10-K has been adjusted for the effect of the stock split (Refer to Note 10, Earnings Per Share, in this Form 10-K for details).

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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