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EARNINGS PER SHARE | 3 Months Ended
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Mar. 31, 2021
EARNINGS PER SHARE |
EARNINGS PER SHARE | 16. EARNINGS PER SHARE Basic and diluted weighted-average shares outstanding are as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​
​ | ​ | March 31, | ​
​ |  | 2021 |  | 2020 |
Basic weighted average shares outstanding |  | 14,306 |  | 14,180 |
Dilutive effect of equity awards |  | 132 |  | 94 |
Diluted weighted average shares outstanding |  | 14,438 |  | 14,274 |
​ For the three months ended March 31, 2021 and 2020, the anti-dilutive common shares excluded from the calculation of diluted earnings per share were immaterial.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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