STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net loss	$ (2,744)	$ (2,389)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	4	3
Amortization of deferred charges	31
Share-based compensation	130	158
Change in operating assets and liabilities:
Other current assets	(139)	(251)
Other assets		(698)
Accounts payable	(144)	(45)
Accrued compensation and employee benefits	(206)	(348)
Accrued expenses and other liabilities	(43)	(117)
Other	(2)
Net cash used in operating activities	(3,113)	(3,687)
Cash flows from investing activities:
Purchase of property and equipment	(2)
Net cash used in investing activities	(2)
Cash flows from financing activities:
Proceeds from the issuance of common stock		9,018
Repayment of principal on vendor finance agreement	(55)	(51)
Net cash (used in) provided by financing activities	(55)	8,133
Net (decrease) increase in cash and cash equivalents	(3,170)	4,446
Cash and cash equivalents, beginning of period	15,354	16,756
Cash and cash equivalents, end of period	12,184	21,202
Supplemental cash flow information:
Interest paid	1	1
Supplemental disclosure of noncash investing and financing transactions:
Vendor finance agreement	138	128
Common stock
Cash flows from financing activities:
Offering costs		$ (834)