Registration of securities issued in business combination transactions

Commitments and Contingencies Engagements (Detail)

v3.6.0.2
Commitments and Contingencies Engagements (Detail) - USD ($)
shares in Thousands, $ in Thousands
 1 Months Ended
Aug. 02, 2016
Mar. 31, 2016
Aug. 31, 2016
Jul. 31, 2015
Jun. 30, 2016
Jun. 30, 2015
Sep. 30, 2011
Loss Contingencies [Line Items]              
Percentage interest in potential contingent consideration             52.00%
Engagement of RFC Ambrian as financial advisor for farmout of NT/P82              
Loss Contingencies [Line Items]              
Oil and gas properties, ownership percentage       100.00%      
Cash payment for first initial stage       $ 20      
Cash payment for second initial stage       80      
Contingent professional fees       $ 250      
Contingent professional fees, percentage of transaction       5.00%      
Percentage interest in potential contingent consideration       5.00%      
Petrie Partners, LLC              
Loss Contingencies [Line Items]              
Shares issuable upon closing of Merger (in shares) 410            
Transaction closing, divestiture transaction fee | Petrie Partners, LLC              
Loss Contingencies [Line Items]              
Estimate of possible loss           $ 450  
Loss contingency in period     $ 450        
Transaction fee | Petrie Partners, LLC              
Loss Contingencies [Line Items]              
Estimate of possible loss           800  
Transaction fee, cash portion | Petrie Partners, LLC              
Loss Contingencies [Line Items]              
Estimate of possible loss           300  
Loss contingency in period $ 300            
Transaction fee, stock portion, value | Petrie Partners, LLC              
Loss Contingencies [Line Items]              
Estimate of possible loss         $ 500 500  
Fairness opinion, opinion fee | Petrie Partners, LLC              
Loss Contingencies [Line Items]              
Estimate of possible loss           $ 300  
Loss contingency in period   $ 300