Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net Loss	$ (9,157)	$ (6,064)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	382	301
Deferred tax benefit	(24)	0
Stock-based compensation	1,358	798
Non-cash investment income	0	(1)
Non-cash patent write-off	0	14
Changes in assets and liabilities:
Accounts receivable	(106)	0
Prepaids and other current assets	(39)	95
Other assets	(3)	0
Accounts payable	(248)	182
Accrued expenses	70	50
Accrued salaries and payroll related expenses	160	36
Deferred revenue	(84)	0
Deferred rent	(12)	(17)
Net cash used in operating activities	(7,703)	(4,606)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(369)	(236)
Expenditures for patents and domain names	(193)	(105)
Redemption of investments held-to-maturity	4,747	3,006
Purchase of investments held-to-maturity	0	(4,249)
Net cash provided by (used in) investing activities	4,185	(1,584)
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from the sale of common stock from private placement offering	7,468	5,177
Proceeds from the exercise of stock options	54	0
Net cash provided by financing activities	7,522	5,177
Effects of currency translation on cash	0	0
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	4,004	(1,013)
CASH AND CASH EQUIVALENTS — Beginning of period	5,084	2,501
CASH AND CASH EQUIVALENTS — End of period	9,088	1,488
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Taxes Paid	1	1
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES
Issuance of common stock in settlement of liability	272	110
Stock options issued in settlement of liability	332	0
Property and equipment included in accounts payable	30	0
Patents included in accounts payable	$ 23	$ 0