Contingencies and litigations (Details) (USD $)	Dec. 31, 2014	Feb. 14, 2012	Mar. 31, 2011	Dec. 31, 2009	Jan. 31, 2006
Contingencies and litigations
Acutal damages found by jury in millions				$ 66,500,000
Actual damages in tortous interference claim millions				31,120,000
Exemplary damages and individual and Eurenergy millions				8,500,000
reinstated the jury award of actual damages jointly and severely against The individual and EurEnergy millions		66,500,000
Received an invoice from Chesapeake					556,217
Chesapeake received a summary judgment award			686,874
Further the judgment awarded Chesapeake additional legal fees of (Total legal fee awarded)			30,000
Company arranged for a bond to the benefit of Chesapeake from a third party bonding Company for payment of the amount			791,960
Company has appealed the judgment to the Court of Appeals which reduced the judgment	22,000
Chesapeake received a summary judgment including prejudgment interest			$ 65,000