Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net loss	$ (7,882)	$ (6,690)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,415	1,339
Depreciation and amortization	83	64
Loss on disposal of property and equipment		1
Changes in operating assets and liabilities:
Accounts receivable	236	1,431
Projects in process	(44)	(624)
Prepaid expenses and other assets	(61)	259
Accounts payable and accrued expenses	429	20
Deferred revenue	(186)	88
Net cash used in operating activities	(6,010)	(4,112)
Cash flows from investing activities:
Purchase of property and equipment	(86)	(34)
Net cash used in investing activities	(86)	(34)
Cash flows from financing activities:
Proceeds from sales of common stock, net of offering costs	9,254
Proceeds from exercise of stock options		166
Proceeds from exercise of stock warrants	36	200
Net cash provided by financing activities	9,290	366
Effect of exchange rate changes on cash	39	37
Net increase (decrease) in cash	3,233	(3,743)
Cash at beginning of period	8,815	9,097
Cash at end of period	12,048	5,354
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1	30
Supplemental disclosure on non-cash investing and financing activities:
Purchase of equipment with capital lease obligation	$ 530