Related Party Transactions - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended			1 Months Ended		0 Months Ended
	Dec. 12, 2013	Dec. 31, 2013	Dec. 31, 2012	Nov. 30, 2013 Private Placement [Member] Private_placement	Nov. 30, 2013 Officers And Directors [Member] Officers	Dec. 12, 2013 Harvest Vinccler S.C.A. [Member] Hnr Energia [Member]	Dec. 12, 2013 London Interbank Offered Rate (LIBOR) [Member]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Sale of common stock		48,666,000	45,882,000	1,704,800	246,000
Proceeds from sale of stock				$ 5.40	$ 0.80
Common stock sales price		$ 0.01	$ 0.01	$ 3.15	$ 3.15
Number of private placement transactions				12
Number of officers					6
Amount of notes payable to related party						10.4
Amount of notes, paid						4.3
Notes payable amount, outstanding	$ 6.1
Interest rate on notes payable	0.50%
Notes payable maturity date							Jun. 30, 2016