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DERIVATIVE INSTRUMENTS, CHANGES IN DERIVATIVE WARRANT LIABILITY (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Changes in Derivative Warrant Liability
Balance at beginning of year	$ 1,314
Balance at end of period	1,073
Warrants
Changes in Derivative Warrant Liability
Balance at beginning of year	1,314	$ 1,907
(Decrease) increase in the fair value of the warrants	(241)	1,047
Balance at end of period	$ 1,073	$ 2,954

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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