- 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. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References+ Details

Financial Instruments (Details) (USD $)	3 Months Ended		6 Months Ended
Financial Instruments (Details) (USD $)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Recurring	Jun. 30, 2011 Recurring	Jun. 30, 2012 Recurring Level 1	Dec. 31, 2011 Recurring Level 1	Jun. 30, 2012 Recurring Level 2	Dec. 31, 2011 Recurring Level 2	Jun. 30, 2012 Recurring Level 3	Dec. 31, 2011 Recurring Level 3	Jun. 30, 2012 Recurring Total	Dec. 31, 2011 Recurring Total	Jun. 30, 2012 4.00% Convertible Debentures Recurring Level 1	Dec. 31, 2011 4.00% Convertible Debentures Recurring Level 1	Jun. 30, 2012 4.00% Convertible Debentures Recurring Level 2	Dec. 31, 2011 4.00% Convertible Debentures Recurring Level 2	Jun. 30, 2012 4.00% Convertible Debentures Recurring Level 3	Dec. 31, 2011 4.00% Convertible Debentures Recurring Level 3	Jun. 30, 2012 4.00% Convertible Debentures Recurring Total	Dec. 31, 2011 4.00% Convertible Debentures Recurring Total	Jun. 30, 2012 5.00% Convertible Debentures Recurring Level 1	Jun. 30, 2012 5.00% Convertible Debentures Recurring Level 2	Jun. 30, 2012 5.00% Convertible Debentures Recurring Level 3	Jun. 30, 2012 5.00% Convertible Debentures Recurring Total
Assets, Fair Value Disclosure [Abstract]
Available-for-sale investments							$ 9,565,000	$ 1,416,000	$ 0	$ 0	$ 0	$ 0	$ 9,565,000	$ 1,416,000
Warrants								0		555,000		0		555,000
Financial assets							9,565,000	1,416,000	0	555,000	0	0	9,565,000	1,971,000
Liabilities, Fair Value Disclosure [Abstract]
Convertible debentures															50,301,000	121,625,000	0	0	0	0	50,301,000	121,625,000	74,003,000	0	0	74,003,000
Financial liabilities							124,304,000	121,625,000	0	0	0	0	124,304,000	121,625,000
Accrued interest																					200,000					300,000
(Gain)/loss on fair value of convertible debentures	$ 1,145,000	$ (6,107,000)	$ 2,037,000	$ (24,292,000)	$ 2,000,000	$ (24,300,000)