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MERGER (Details)
 3 Months Ended
Feb. 11, 2015
USD ($)
$ / shares
shares
Feb. 10, 2015
$ / shares
Mar. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Mar. 31, 2015
USD ($)
Common stock, par value (in dollars per share) | $ / shares     $ 0.01 $ 0.01  
Fair value of assets acquired and liabilities assumed          
Common stock, shares outstanding | shares     21,596,240 21,580,865  
Net loss     $ (8,600,000)   $ (6,592,000)
Legacy TGC          
Common stock, par value (in dollars per share) | $ / shares   $ 0.01      
Reverse stock split ratio   0.33      
Split-effected Common Stock | shares 1.760        
Increase in preliminary estimated amount of property and equipment       $ 5,055,000  
Increase in preliminary estimated amount of current liability       943,000  
Decrease in preliminary estimated amount of current assets       625,000  
Decrease in preliminary estimated amount of intangible assets       2,953,000  
Decrease in deferred tax assets related to adjustments to preliminary estimates       534,000  
Increase in depreciation       628,000  
Decrease in amortization expense       $ 697,000  
Fair value of assets acquired and liabilities assumed          
Stock consideration $ 42,902,000        
Interest bearing debt assumed 12,048,000        
Debt-free current liabilities 13,590,000        
Total purchase price consideration including liabilities assumed 68,540,000        
Current assets excluding cash and cash equivalents 15,531,000        
Cash and cash equivalents 12,382,000        
Total current assets 27,913,000        
Fair value of property and equipment 33,867,000        
Net deferred tax asset 6,360,000        
Total indicated value of assets $ 68,540,000        
Common stock, shares outstanding | shares 7,381,476        
Accrued taxes $ 865,000        
Pre-tax merger-related costs         2,600,000
Revenues         8,592,000
Net loss         $ (2,837,000)
Legacy TGC | Minimum          
Fair value of assets acquired and liabilities assumed          
Estimated useful lives of property and equipment 18 months        
Legacy TGC | Maximum          
Fair value of assets acquired and liabilities assumed          
Estimated useful lives of property and equipment 12 years        
Legacy TGC | Trademarks/tradenames          
Fair value of assets acquired and liabilities assumed          
Identified intangible assets $ 400,000        
Legacy Dawson          
Common stock, par value (in dollars per share) | $ / shares $ 0.33