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DERIVATIVE INSTRUMENTS (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Changes in derivative warrant liability
Balance at beginning of year	$ 7,224us-gaap_DerivativeLiabilitiesCurrent
Reduction in derivative liability due to exercise and modification of warrants	(4,866)
Increase (decrease) in fair value of warrants	10,286
Balance at end of period	$ 12,644us-gaap_DerivativeLiabilitiesCurrent

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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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