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SUBSEQUENT EVENTS (Details) (Subsequent events, USD $)	0 Months Ended
	Feb. 04, 2014	Feb. 27, 2014
Subsequent events
SUBSEQUENT EVENTS
Underwritten public offering (in shares)	25,875,000
Public offering price (in dollars per share)	$ 4.00
Net approximate cash proceeds from public offering after deducting the underwriting discount and estimated offering expenses	$ 96,700,000
Aggregate future minimum payments for operating lease obligations under amended agreement		$ 1,382,000

X

- Definition

Amount per share assigned to the consideration received for shares issued at a public offering.

+ References

No definition available.

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X

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Section 50

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- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 505

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-Name Regulation S-X (SX)

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X

- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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-Name Regulation S-X (SX)

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