Quarterly report pursuant to Section 13 or 15(d)

Concentrations (Details)

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Concentrations (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2015
Jan. 28, 2015
Dec. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Percentage of Capacity     66.00%        
Revenue related to the DOD contract       89.00% 84.00% 90.00% 88.00%
Percentage of amounts due from the department of defense in relation to consolidated accounts receivable     90.00% 94.00%   94.00%  
Percentage of payment to supplier of natural gas in relation to cost of sales       74.00% 55.00% 89.00% 69.00%
Key Bank [Member] | Secured Debt [Member]              
Debt issuance cost           $ 242 $ 501
Department of Defense [Member] | Omega [Member]              
Natural gas distribution agreement 10 years 6 months          
Potential natural gas distribution agreement           10 years