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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher SEC

-Name Regulation S-X (SX)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Warrant

-URI http://asc.fasb.org/extlink&oid=6528364

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 14

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

+ References+ Details

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]
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)