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STOCKHOLDERS' EQUITY - PUBLIC OFFERING (Details) - USD ($) |  | 12 Months Ended
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Feb. 04, 2014 | Dec. 31, 2014
Underwritten Public Offering |  |
Issuance of common stock in connection with public offering, net of issuance costs (in shares) | 25,875,000 |
Public offering price (in dollars per share) | $ 4.00 |
Net cash proceeds from public offering after deducting the underwriting discount and offering expenses | $ 96,805,000 | $ 96,805,000

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