Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations (Details)

v3.5.0.2
Discontinued Operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2016
Jun. 30, 2016
Sep. 30, 2016
Sep. 30, 2011
Nautilus Purchase and Sale Agreement (PSA)        
Debt Instrument [Line Items]        
Future contingent production payments payable       $ 5,000
CO2 Business        
Debt Instrument [Line Items]        
Ownership percentage, sold in period 100.00%      
Series A Preferred Stock        
Debt Instrument [Line Items]        
Percent of shares transferred 100.00%      
One Stone | One Stone Exchange Agreement | Investor        
Debt Instrument [Line Items]        
Disposal Group, including Discontinued Operations, Transaction Costs, Cumulative   $ 690 $ 968  
Transaction costs   278    
One Stone | Nautilus Poplar, LLC (NP) | One Stone Exchange Agreement        
Debt Instrument [Line Items]        
Ownership percentage, sold in period 100.00%      
One Stone | Series A Preferred Stock | One Stone Exchange Agreement        
Debt Instrument [Line Items]        
Percent of shares transferred 100.00%      
Discontinued Operations, Held-for-sale        
Debt Instrument [Line Items]        
Cash   141 0  
Discontinued Operations, Held-for-sale | CO2 Business        
Debt Instrument [Line Items]        
Cash   141 $ 0  
Collateral   $ 150