Registration of securities issued in business combination transactions

Pro Forma Financial Information - Narrative (Detail)

v3.6.0.2
Pro Forma Financial Information - Narrative (Detail)
£ in Thousands, $ in Thousands, shares in Millions
12 Months Ended
Aug. 11, 2016
GBP (£)
shares
Aug. 01, 2016
USD ($)
Jun. 30, 2016
GBP (£)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Apr. 15, 2016
USD ($)
Jun. 30, 2015
USD ($)
Subsequent Event [Line Items]              
Notes payable       $ 104 $ 783   $ 0
Celtique Claim              
Subsequent Event [Line Items]              
Litigation settlement, amount | £ £ 500   £ 500        
Weald ATA, IoW ATA, and Settlement Agreement | UK Oil and Gas Investments              
Subsequent Event [Line Items]              
Investment owned (in shares) | shares 50.9            
Investor | One Stone Exchange Agreement | One Stone              
Subsequent Event [Line Items]              
Amount due from related party   $ 900          
Notes payable           $ 625  
Amount of transaction   $ 467