Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net Loss	$ (4,894)	$ (3,076)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	188	145
Deferred tax benefit	(26)	0
Stock-based compensation	693	358
Non-cash patent write-off	0	14
Changes in assets and liabilities:
Accounts receivable	11	0
Prepaids and other current assets	(63)	(14)
Other assets	(14)	0
Accounts payable	123	298
Accrued expenses	43	0
Accrued salaries and payroll related expenses	(8)	(96)
Deferred revenue	(36)	53
Deferred rent	(7)	(9)
Net cash used in operating activities	(3,990)	(2,327)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(233)	(91)
Expenditures for patents and domain names	(125)	(34)
Redemption of investments held-to-maturity	4,747	3,006
Net cash provided by investing activities	4,389	2,881
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from the sale of common stock from private placement offering	7,471	0
Net cash provided by financing activities	7,471	0
Effects of currency translation on cash	3	0
NET INCREASE IN CASH AND CASH EQUIVALENTS	7,873	554
CASH AND CASH EQUIVALENTS — Beginning of period	5,084	2,501
CASH AND CASH EQUIVALENTS — End of period	12,957	3,055
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Taxes Paid	1	1
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES
Issuance of common stock in settlement of liability	119	0
Stock options issued in settlement of liability	332	0
Prepaids included in accounts payable	43	0
Property and equipment included in accounts payable	3	0
Patents included in accounts payable	$ 36	$ 0