Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Adjustments to reconcile net loss to net cash used for operating activities:	$ (4,694)	$ (7,439)
Depreciation	64	64
Amortization of debt discount and issuance costs	207	1,311
Interest expense added to loan principal	1,838	1,126
Loss on early extinguishment of debt and debt refinancing		835
Compensation charge for stock and share option awards	30	439
Changes in operating assets and liabilities:
(Increase) decrease in accounts receivable	(10)	216
Increase in prepaid expenses and other	(298)	(413)
Increase in other assets	(271)	(2,951)
Decrease in accounts payable	(746)	(282)
(Decrease) increase in accrued liabilities	(554)	372
Net cash used for operating activities	(4,434)	(6,722)
Cash flows from investing activities:
Additions to property, plant and equipment		(167)
Net cash used for investing activities		(167)
Cash flows from financing activities:
Net proceeds from issuance of long-term debt		17,500
Debt issuance costs		(1,243)
Principal payments on long-term debt	(3)	(2)
Net cash (used for) provided by financing activities	(3)	16,255
Net (decrease) increase in cash and cash equivalents	(4,437)	9,366
Cash and cash equivalents, beginning of period	11,887	1,685
Cash and cash equivalents, end of period	$ 7,450	$ 11,051