CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities:
Net loss from continuing operations	$ (10,613)	$ (13,379)
Adjustments to reconcile net loss from continuing operations to cash used in operating activities:
Share-based compensation expense to employees and others	1,449	2,931
Depreciation and amortization	1,109	1,382
Gain on early extinguishment of debt	(8,427)
Loss from exercise of warrants	1,021
Derivative fair value adjustment	514	(3,050)
Amortization of debt issuance costs	186	2,337
Amortization of initial fair value of derivative	(51)	(134)
Amortization of beneficial conversion feature	132
Impairment	3,081	3,467
Gain on debt for equity exchange	(435)	(3,115)
Other	46	(82)
Changes in operating assets and liabilities:
Accounts receivable		550
Prepaid expenses and other assets	(186)	(275)
Deferred revenue and other obligations	(390)	(754)
Accounts payable and accrued expenses	(1,937)	(1,883)
Cash used in operating activities of continuing operations	(14,501)	(12,005)
Cash used in operating activities of discontinued mining and plant operations	(620)	(4,973)
Cash used in operating activities	(15,121)	(16,978)
Investing activities:
Purchases of construction in progress, property, plant and equipment	(197)	(1,421)
Proceeds from sale of assets	381
Restricted cash		4,953
Other	(20)
Cash provided by investing activities of continuing operations	164	3,532
Cash provided by investing activities of discontinued mining and plant operations	2,785	23,537
Cash provided by investing activities	2,949	27,069
Financing Activities:
Proceeds from the 2011 common stock sale, net of offering costs	14,546
Proceeds from the 2011 "ATM Program", net of commission and financing costs	412
Proceeds from the 2010 common stock sale, net of offering costs		8,043
Proceeds from the issuance of 2010 convertible preferred stock, net of closing costs		8,746
Proceeds from exercise of warrants	1,029
Payment of dividends on convertible preferred stock		(4,312)
Payments of note principal related to 2007 Notes	(5,310)
Payment of note principal related to 2009 Notes		(17,250)
Payments of debt issue costs	(262)	(2,179)
Other	(11)	17
Cash provided by (used in) financing activities of continuing operations	10,404	(6,935)
(Decrease) increase in cash and cash equivalents	(1,768)	3,156
Cash and cash equivalents, beginning of period	2,974	2,207
Cash and cash equivalents, end of period	$ 1,206	$ 5,363