STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net loss	$ (6,545)	$ (2,515)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	97	220
Bad debt expense	24
Non-cash charges for stock-based compensation	923	548
(Gain)/loss on sale of long lived assets	(18)	58
Changes in current assets and liabilities, net	(509)	(428)
Changes in non-current assets, net	89	89
Net cash used in operating activities	(5,939)	(2,028)
Cash flows provided by investing activities:
Purchases of equipment	(100)	(44)
Proceeds from sale of property and equipment	18	5
Purchases of investment securities		(9,723)
Proceeds from sale or maturity of investment securities	5,092	3,843
Net cash provided by/(used in) investing activities	5,010	(5,919)
Cash flows from financing activities:
(Costs)/proceeds from issuance of common stock	(24)	10,666
Cash flows from financing activities:	(24)	10,666
Change in cash and cash equivalents	(953)	2,719
Beginning balance of cash and cash equivalents	7,968	5,249
Ending balance of cash and cash equivalents	$ 7,015	$ 7,968