CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net loss	$ (7,940)	$ (9,849)	$ (10,190)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	179	125	69
Amortization of debt discount and debt issuance costs	426	217	15
Stock-based compensation	856	616	608
Change in fair value of derivative liabilities		4,776	4,712
Reduction in accounts payable and accrued expenses from expiration of statute of limitations	(224)	(440)	(336)
Warrants issued in lieu of cash as compensation for services	53	108	27
Change in assets and liabilities
Accounts receivable	35	26	20
Inventory	(411)	(243)	(217)
Other assets	62	(50)	(20)
Accounts payable	188	(130)	(8)
Accrued expenses	130	(116)	(737)
Deferred revenue	165	102	494
Pension obligation	59	7	10
Total adjustments	1,518	4,998	4,637
Net cash used in operating activities	(6,422)	(4,851)	(5,553)
Cash flows from investing activities
Purchase of property and equipment	(117)	(193)	(181)
Net cash used in investing activities	(117)	(193)	(181)
Cash flows from financing activities
Proceeds from line of credit	1,550
Repayment of notes payable			(45)
Proceeds from exercise of stock options	67	11	7
Dividends paid	(51)	(51)	(229)
Proceeds from exercised warrants to purchase stock	2,848	3,291	3,527
Net cash provided by financing activities	4,414	3,251	3,260
Effect of exchange rate changes on cash and cash equivalents	(20)	(69)	(74)
Net decrease in cash and cash equivalents	(2,145)	(1,862)	(2,548)
Cash and cash equivalents at beginning of year	2,363	4,225	6,773
Cash and cash equivalents at end of year	218	2,363	4,225
Supplemental disclosure of cash flow information:
Cash paid for interest	2
Cash paid for income taxes	1	1
Summary of non-cash investing and financing activities:
Conversion of related party notes payable into common stock	85	10
Warrants issued for intangible asset purchase			87
Beneficial conversion feature of convertible debt	296
Contingent royalty payment			72
Acquisition of intangible assets with warrants			(159)
Issuance of common stock pursuant to cashless warrant exercises	9	45	704
Additional minimum pension liability	(744)	(622)
Reclassification of warrants previously classified as derivative liabilities to additional paid-in capital	57	6,684	13,588
Issuance of common warrants securing line of credit borrowing facility	128	580
Issuance of restricted stock pursuant to achievement of vesting conditions	$ 1	$ 1