CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities
Net loss	$ (8,055)	$ (10,265)
Adjustments to reconcile net loss to net cash used by operating activities:
Depreciation and amortization	86	47
Amortization of debt issuance costs	145	15
Reduction in accounts payable and accrued liabilities from the expiration of statute of limitations	(228)	(328)
Change in fair value of derivative liabilities	4,679	6,473
Warrants issued in lieu of cash paid for services	108	25
Stock-based compensation	411	454
Change in assets and liabilities
Accounts receivable	15	(690)
Inventory	(226)	(135)
Other assets	41	(87)
Accounts payable	(212)	(106)
Deferred revenue	549	814
Accrued expenses	41	(749)
Pension obligation	41	15
Total adjustments	5,450	5,748
Net cash used in operating activities	(2,605)	(4,517)
Cash flows from investing activities
Purchase of property and equipment	(103)	(159)
Net cash used in investing activities	(103)	(159)
Cash flows from financing activities
Proceeds from exercised stock options	8	7
Proceeds from exercised warrants to purchase stock	2,014	3,502
Dividends paid	(25)	(203)
Repayment of notes payable		(45)
Net cash provided by (used in) financing activities	1,997	3,261
Effect of exchange rate changes on cash	(46)	(42)
Net decrease in cash and cash equivalents	(757)	(1,457)
Cash and cash equivalents at beginning of period	4,225	6,773
Cash and cash equivalents at end of period	3,468	5,316
Supplemental disclosure of cash flow information:
Cash paid for interest
Cash paid for income taxes	1
Summary of non-cash investing and financing activities:
Reclassification of warrants previously classified as derivative liabilities to additional paid-in capital	6,276	13,588
Issuance of common stock warrants securing line of credit borrowing facility	580
Issuance of common stock pursuant to cashless warrant exercises	43	704
Warrants issued for intangible asset purchases		87
Contingent royalty payment		72
Acquisition of intangible assets		(159)
Issuance of common stock pursuant to achievement of vesting conditions	$ 1