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Merger (Details) | Feb. 11, 2015 $ / shares shares | Dec. 31, 2017 $ / shares | Dec. 31, 2016 $ / shares
--- | --- | --- | ---
Common stock, par value (in dollars per share) |  | $ 0.01 | $ 0.01
Legacy TGC |  |  |
Common stock, par value (in dollars per share) | $ 0.01 |  |
Reverse stock split ratio | 0.33 |  |
Split-effected Exchange Ratio (in shares) | shares | 1.760 |  |
Legacy Dawson |  |  |
Common stock, par value (in dollars per share) | $ 0.3333 |  |

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