Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net loss and comprehensive loss	$ (10,832)	$ (9,209)
Depreciation	126	127
Amortization of debt discount and issuance costs	449	417
Interest expense added to loan principal	3,982	3,689
Compensation charge for stock and share option awards	510	61
Changes in operating assets and liabilities:
Decrease in accounts receivable	144	48
Increase in prepaid expenses and other	(379)	(258)
Increase in other assets	(243)	(271)
Increase (decrease) in accounts payable	324	(611)
Increase (decrease) in accrued liabilities	571	(550)
Net cash used for operating activities	(5,348)	(6,557)
Cash flows from investing activities:
Additions to property, plant and equipment	(240)	(14)
Net cash used for investing activities	(240)	(14)
Cash flows from financing activities:
Principal payments on long-term debt	(12)	(5)
Net cash used for financing activities	(12)	(5)
Net decrease in cash and cash equivalents	(5,600)	(6,576)
Cash and cash equivalents, beginning of period	16,206	11,887
Cash and cash equivalents, end of period	$ 10,606	$ 5,311