Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
OPERATING ACTIVITIES:
Net loss	$ (19,933)	$ (22,291)	$ (21,931)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,324	1,896	2,035
Securities received in payment of license fees			(750)
(Gain)/loss on discontinued operations		(129)	1,446
Share-based compensation	740	1,647	1,152
Loss on disposal of fixed assets	924	710	17
Change in fair value of warrants	(1,274)
Impairment of patents		47
Loss/(gain) on sale of available for sale securities		2,045	(868)
Asset deposit			375
Changes in operating assets and liabilities:
Accounts receivable, net	985	(635)	276
Accounts receivable from related party, net			(4)
Product inventories	(67)	(1,599)	(4,896)
Prepaid expenses and other current assets	29	(449)	(1,352)
Other assets		125	33
Trade accounts payable	2,959	1,064	958
Accrued salaries and benefits	389	118	(736)
Accrued warranty	143	132	43
Deferred revenues	(900)	2,205
Accrued liabilities	34	(58)	(6)
Net cash used in operating activities	(14,647)	(15,172)	(24,208)
INVESTING ACTIVITIES
Sale of available for sale securities		2,599	2,006
Interest on available for sale securities		8	6
Purchase of property, plant and equipment	(604)	(953)	(149)
Proceeds from sale of assets		13
Net cash (used in) provided by investing activities	(604)	1,667	1,863
FINANCING ACTIVITIES:
Issuance of common shares for cash, net of issuance costs	57,826	692	12,813
Payment of warrant redemption	(530)
Proceeds from notes payable	1,500	6	387
Payment of notes payable	(1,705)	(600)	(926)
Proceeds from long-term debt			58
Repayment of long-term debt	(16)	(20)	(15)
Contributions from minority interest			62
Net cash provided by financing activities	57,075	78	12,379
Net increase (decrease) in cash and cash equivalents	41,824	(13,427)	(9,966)
Beginning of period	4,695	18,122	28,088
End of period	46,519	4,695	18,122
SUPPLEMENTAL DISCLOSURE:
Cash paid for interest	151	49	97
NON-CASH TRANSACTIONS:
Acquisition of assets included in accounts payable	38	26	75
Issuance of restricted stock to directors		320	397
Impairment of AlSher Titania fixed assets			1,308
Payment of license with stock			$ 750