|
Notes Payable (Details)
|
0 Months Ended | 12 Months Ended | 0 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 19, 2013
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
Dec. 19, 2013
USD ($)
|
Dec. 31, 2012
USD ($)
|
Dec. 31, 2011
USD ($)
|
May 13, 2013
Bridge Loan [Member]
USD ($)
|
Jun. 24, 2013
Bridge Loan [Member]
|
May 13, 2013
Bridge Loan [Member]
USD ($)
|
Sep. 19, 2014
RMBAH First Loan Facility [Member]
USD ($)
|
Mar. 14, 2014
RMBAH First Loan Facility [Member]
USD ($)
|
Oct. 23, 2013
RMBAH First Loan Facility [Member]
USD ($)
|
Jun. 30, 2013
RMBAH First Loan Facility [Member]
USD ($)
|
Jun. 24, 2013
RMBAH First Loan Facility [Member]
USD ($)
|
Dec. 31, 2014
RMBAH First Loan Facility [Member]
USD ($)
|
Sep. 19, 2014
RMBAH First Loan Facility [Member]
|
Mar. 14, 2014
RMBAH First Loan Facility [Member]
USD ($)
|
Dec. 19, 2013
RMBAH First Loan Facility [Member]
|
Jun. 30, 2013
RMBAH First Loan Facility [Member]
CAD
|
Oct. 23, 2013
RMBAH Second Loan Facility [Member]
USD ($)
|
Aug. 31, 2013
RMBAH Second Loan Facility [Member]
USD ($)
|
Aug. 31, 2013
RMBAH Second Loan Facility [Member]
CAD
|
Oct. 15, 2013
Sweetwater IDR Bond [Member]
USD ($)
|
Dec. 31, 2014
Sweetwater IDR Bond [Member]
USD ($)
|
Jun. 30, 2013
Three-month LIBOR
RMBAH First Loan Facility [Member]
|
Dec. 31, 2014
First And Second Loan Facility [Member]
USD ($)
|
Dec. 19, 2013
Due Quarterly Commencing From March Thirty One Two Thousand Fourteen [Member]
RMBAH First Loan Facility [Member]
USD ($)
|
Oct. 23, 2013
Due Quarterly Commencing From January One Two Thousand Fourteen [Member]
Sweetwater IDR Bond [Member]
|
Oct. 23, 2014
Due Quarterly Commencing From January One Two Thousand Fifteen [Member]
Sweetwater IDR Bond [Member]
item
|
Dec. 31, 2014
Due Quarterly Commencing From September Nineteen Two Thousand Fourteen [Member]
RMBAH First Loan Facility [Member]
USD ($)
|
|
| Notes Payable | ||||||||||||||||||||||||||||||
| Proceeds from Issuance of Long-term Debt | $ 5,000,000 | $ 20,000,000 | $ 15,000,000 | $ 34,000,000 | ||||||||||||||||||||||||||
| Interest added to variable rate (as a percent) | 7.50% | |||||||||||||||||||||||||||||
| Annual interest rate (as a percent) | 7.50% | 5.75% | ||||||||||||||||||||||||||||
| Effective Interest Rate | 21.60% | 8.75% | 7.75% | 7.77% | 16.10% | |||||||||||||||||||||||||
| Debt Instrument Origination Fee Percentage | 4.00% | |||||||||||||||||||||||||||||
| Maturity Date | Jul. 31, 2013 | Mar. 31, 2016 | Oct. 01, 2021 | |||||||||||||||||||||||||||
| Minimum Amounts To Be Obtained For Clearing Debt | 6,000,000 | |||||||||||||||||||||||||||||
| Class Of Warrant Or Right Issued Number | 2,354,545 | 4,294,167 | 3,100,800 | |||||||||||||||||||||||||||
| Class Of Warrant Or Right, Exercise Price Of Warrants Or Rights | $ 1.19 | $ 1.19 | $ 1.35 | $ 1.06 | $ 1.12 | 1.20 | 1.25 | |||||||||||||||||||||||
| Class Of Warrant Or Right Issued Value | 3,100,000 | 1,100,000 | ||||||||||||||||||||||||||||
| Arrangement Fee | 1,200,000 | 900,000 | ||||||||||||||||||||||||||||
| Arrangement Fee Percentage | 6.00% | 6.00% | ||||||||||||||||||||||||||||
| Legal Fees | 200,000 | 100,000 | ||||||||||||||||||||||||||||
| Number of installments | 28 | |||||||||||||||||||||||||||||
| Write off of Deferred Debt Issuance Cost | 4,032,000 | 1,622,000 | 5,654,000 | |||||||||||||||||||||||||||
| Proceeds from debt financing | 5,000,000 | 75,100,000 | 3,500,000 | 1,500,000 | ||||||||||||||||||||||||||
| Periodic payment amount | 7,562,000 | 33,005,000 | 1,250,000 | 810,000 | ||||||||||||||||||||||||||
| Line of Credit Facility, Remaining Borrowing Capacity | 3,500,000 | |||||||||||||||||||||||||||||
| Maximum Borrowing Capacity | $ 5,000,000 | $ 10,000,000 | ||||||||||||||||||||||||||||
| Warrants Cancelled | 1,550,400 | |||||||||||||||||||||||||||||