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Note 5 - Fair Value of Financial Instruments (Details) - Fair Value Information for Financial Assets and Liabilities, as Well as Cost or Amortized Cost (USD $)
In Thousands, unless otherwise specified

Mar. 31, 2014

Dec. 31, 2013

Cost or amortized cost

$ 47,927

$ 57,354

62,946

40,015

61,004

39,474

Crude Oil Price Swap [Member] | Fair Value, Inputs, Level 1 [Member]

^[1]

^[1]

Crude Oil Price Swap [Member] | Fair Value, Inputs, Level 2 [Member]

663

^[1]

(2,490)

^[1]

Crude Oil Price Swap [Member] | Fair Value, Inputs, Level 3 [Member]

^[1]

^[1]

Crude Oil Price Swap [Member]

663

^[1]

(2,490)

^[1]

Crude Oil Price Swap [Member] | Portion at Other than Fair Value Measurement [Member]

Cost or amortized cost

663

^[1]

Cost or amortized cost

(2,490)

^[1]

Natural Gas Price Swap [Member] | Fair Value, Inputs, Level 1 [Member]

^[2]

^[2]

Natural Gas Price Swap [Member] | Fair Value, Inputs, Level 2 [Member]

223

^[2]

(3,941)

^[2]

Natural Gas Price Swap [Member] | Fair Value, Inputs, Level 3 [Member]

^[2]

^[2]

Natural Gas Price Swap [Member]

223

^[2]

(3,941)

^[2]

Natural Gas Price Swap [Member] | Portion at Other than Fair Value Measurement [Member]

Cost or amortized cost

223

^[2]

Cost or amortized cost

(3,941)

^[2]

Forward Contracts [Member] | Fair Value, Inputs, Level 1 [Member]

^[3]

^[3]

Forward Contracts [Member] | Fair Value, Inputs, Level 2 [Member]

1,113

^[3]

2,290

^[3]

Forward Contracts [Member] | Fair Value, Inputs, Level 3 [Member]

^[3]

^[3]

Forward Contracts [Member]

1,113

^[3]

2,290

^[3]

Forward Contracts [Member] | Portion at Other than Fair Value Measurement [Member]

Cost or amortized cost

1,113

^[3]

2,290

^[3]

Fair Value, Inputs, Level 1 [Member] | Natural Gas Price Swap [Member]

^[2]

Fair Value, Inputs, Level 1 [Member]

62,946

40,015

62,946

40,015

Fair Value, Inputs, Level 2 [Member] | Natural Gas Price Swap [Member]

(341)

^[2]

Fair Value, Inputs, Level 2 [Member]

(1,942)

(541)

Fair Value, Inputs, Level 3 [Member] | Natural Gas Price Swap [Member]

^[2]

Natural Gas Price Swap [Member]

(341)

^[2]

Portion at Other than Fair Value Measurement [Member] | Natural Gas Price Swap [Member]

Cost or amortized cost

(341)

^[2]

Portion at Other than Fair Value Measurement [Member]

Cost or amortized cost

62,946

40,015

Cost or amortized cost

$ 61,004

$ 39,474

[1]	This amount relates to derivatives which represent swap contracts on oil prices, valued primarily based on observable inputs, including forward and spot pricesfor related commodity indices, and are included within "prepaid expenses and other" and "accounts payable and accrued expenses" in the condensed consolidated balance sheet with the corresponding gain or loss being recognized within "electricity revenues" in the condensed consolidated statement of operations and comprehensive income (loss).
[2]	This amount relates to derivatives which represent swap contracts on natural gas prices, valued primarily based on observable inputs, including forward andspot prices for related commodity indices, and are included within "prepaid expenses and other" and "accounts payable and accrued expenses" in thecondensed consolidated balance sheet with the corresponding gain or loss being recognized within "electricity revenues" in the condensed consolidatedstatement of operations and comprehensive income (loss).
[3]	This amount relates to derivatives which represent currency forward contracts, valued primarily based on observable inputs, including forward and spot prices for currencies, netted against contracted rates and then multiplied against notational amounts, and are included within "prepaid expenses and other" in the condensed consolidated balance sheet with the corresponding gain or loss being recognized within "foreign currency translation and transaction gains (losses)" in the condensed consolidated statement of operations and comprehensive income (loss).

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References+ Details

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details