Annual report pursuant to Section 13 and 15(d)

Liquidity (Details)

v3.6.0.2
Liquidity (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2016
Jun. 29, 2016
Liquidity And Going Concern [Line Items]          
Oil and natural gas sales $ 59,784 $ 80,445 $ 127,691    
Credit facility borrowing base   $ 20,100   $ 20,000 $ 20,000
Term Loan [Member]          
Liquidity And Going Concern [Line Items]          
Loans payable $ 15,000       $ 15,000