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LONG TERM DEBT AND CREDIT AGREEMENT Carrying Value of Notes Payable (Tables)
 12 Months Ended
Dec. 31, 2015
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]
The net carrying amount of the liability component of the Notes consisted of the following at December 31, 2015 (in thousands):
 
December 31, 2015
Principal amount of Notes
$
125,000

Original debt discount due to:
 
     Allocation of proceeds to equity
(28,299
)
     Allocation of issuance costs to debt
(3,641
)
     Accumulated accretion
2,890

Net carrying value
$
95,950