Registration of securities issued in business combination transactions

Related Party Transactions (Detail)

v3.6.0.2
Related Party Transactions (Detail)
$ in Thousands
 3 Months Ended 4 Months Ended 12 Months Ended 19 Months Ended
Mar. 31, 2016
Sep. 30, 2016
USD ($)
Owner
Sep. 30, 2015
USD ($)
Mar. 31, 2015
AUD
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
AUD
MI4 Oil and Gas LLC | Utah CO2 LLC              
Related Party Transaction [Line Items]              
Number of noncontrolling interest owners | Owner   1          
CO2 Business              
Related Party Transaction [Line Items]              
Ownership percentage, sold in period 100.00%            
Series A Preferred Stock              
Related Party Transaction [Line Items]              
Percent of shares transferred 100.00%            
Devizes International Consulting Limited | Affiliated Entity              
Related Party Transaction [Line Items]              
Amount of transaction   $ 21 $ 25   $ 59 $ 147  
MPA | Compensation Arrangement | Director              
Related Party Transaction [Line Items]              
Amount of transaction | AUD       AUD 5,400     AUD 5,400
MI3 Petroleum Engineering | Compensation Arrangement | Affiliated Entity              
Related Party Transaction [Line Items]              
Amount of transaction     292   $ 293 $ 1,100  
MI3 Petroleum Engineering | Compensation Arrangement | Affiliated Entity | Discontinued Operations              
Related Party Transaction [Line Items]              
Amount of transaction   $ 0 $ 292