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Note 4 - Earnings Per Share | 9 Months Ended
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Sep. 30, 2018
Notes to Financial Statements |
Earnings Per Share [Text Block] | 4. Earnings Per Share The following table sets forth the computations of basic and diluted net income (loss) per share (in thousands, except per share data):
|  | Three Months Ended September 30 , |  |  | Nine Months Ended September 30 , |
|  | 20 18 |  |  | 20 17 |  |  | 20 18 |  |  | 20 17 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to SPAR Group, Inc. |  | $ | 621 |  |  | $ | 246 |  |  | $ | (1,018 | ) |  | $ | 346 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares used in basic net income per share calculation |  |  | 20,654 |  |  |  | 20,602 |  |  |  | 20,650 |  |  |  | 20,633 |
Weighted average shares used in diluted net income per share calculation |  |  | 21,320 |  |  |  | 21,320 |  |  |  | 20,650 |  |  |  | 21,331 |
Basic and diluted net income (loss) per common share |  | $ | 0.03 |  |  | $ | 0.01 |  |  | $ | (0.05 | ) |  | $ | 0.02 |

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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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