CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net cash used in operating activities (Note 15)	$ (12,147)	$ (23,435)
Cash flows from investing activities:
Sale of available for sale investments		198
Proceeds from sale of assets	973	4,125
Capitalized costs and acquisitions of property, plant and equipment	(427)	(1,471)
Net cash provided by investing activities	546	2,852
Cash flows from financing activities:
Proceeds from issuance of common stock, net of issue costs	7,410
Net cash provided by financing activities	7,410
Net decrease in cash and cash equivalents	(4,191)	(20,583)
Cash and cash equivalents - beginning of period	19,146	44,406
Cash and cash equivalents - end of period	$ 14,955	$ 23,823