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8. FAIR VALUE MEASUREMENTS (Details 5) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2013
|
Mar. 31, 2012
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2012
Level 3 [Member]
|
Dec. 31, 2011
Level 3 [Member]
|
Dec. 31, 2010
Level 3 [Member]
|
Dec. 31, 2012
Level 3 [Member]
July Offering [Member]
|
Dec. 31, 2012
Level 3 [Member]
September Offering [Member]
|
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| Changes in the fair value of the Company's Level 3 inputs | |||||||||
| Warrants | $ 8,079,000 | $ 4,892,000 | $ 4,892 | $ 1,921 | $ 5,718 | ||||
| Convertible notes | 38,108 | ||||||||
| Retirement of convertible notes | (35,000) | 3,380 | 1,658 | ||||||
| Issuance of warrants | 1,809 | ||||||||
| Exercises of warrants | 2,064 | (113) | (1,155) | ||||||
| Adjustments to fair value of warrant | (1,954) | (4,451) | |||||||
| Adjustments to fair value of convertible notes | $ (3,108) | ||||||||
| X | ||||||||||
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- Definition
Adjustments to fair value of convertible notes No definition available.
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| X | ||||||||||
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- Definition
Issuance of warrants No definition available.
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| X | ||||||||||
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- Definition
Retirement of convertible notes No definition available.
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| X | ||||||||||
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- Definition
Increase in additional paid in capital due to warrants issued during the period. Includes also the proceeds of debt securities issued with detachable stock purchase warrants that are allocable to the warrants. These warrants qualify for equity classification and provide the holder with a right to purchase stock from the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Fair value of convertible debt at the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The cash inflow associated with the amount received from holders exercising their stock warrants. No definition available.
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| X | ||||||||||
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- Definition
Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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