Accounts Payable and Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended	38 Months Ended
	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013
Accounts Payable and Accrued Liabilities
Drilling/permitting	$ 543	$ 382	$ 543
Engineering	1,505	1,796	1,505
Legal	664	720	664
Board of Directors' fees		125
Sichuan success fee	50	1,588	50
Accrued interest		7,251
Compensation and other	1,866	1,245	1,866
Total accounts payable and accrued liabilities	$ 4,628	$ 14,607	$ 4,628