Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net Loss	$ (5,716,000)	$ (4,894,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	195,000	188,000
Deferred tax benefit	0	(26,000)
Stock-based compensation	963,000	693,000
Non-cash patent write-off	8,000	0
Changes in assets and liabilities:
Accounts receivable	(95,000)	11,000
Prepaids and other current assets	80,000	(63,000)
Restricted cash	(100,000)	0
Other assets	0	(14,000)
Accounts payable	403,000	123,000
Accrued expenses	(79,000)	43,000
Accrued salaries and payroll related expenses	(526,000)	(8,000)
Customer deposits	130,000	0
Deferred revenue	0	(36,000)
Deferred taxes	(3,000)	7,000
Deferred rent	(3,000)	0
Net cash used in operating activities	(4,737,000)	(3,990,000)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(519,000)	(233,000)
Expenditures for patents and domain names	(43,000)	(125,000)
Redemption of investments held-to-maturity	0	4,747,000
Purchase of investments held-to-maturity	(24,985,000)	0
Net cash provided by (used in) investing activities	(25,547,000)	4,389,000
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from the sale of common stock from private placement offering	0	7,471,000
Net proceeds from the sale of common stock from underwritten public offering	18,381,000	0
Proceeds from exercise of warrants	43,000	0
Net cash provided by financing activities	18,424,000	7,471,000
Effects of exchange rates on cash, cash equivalents and restricted cash	3,000	3,000
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(11,857,000)	7,873,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH — Beginning of period	19,624,000	5,184,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH — End of period	7,767,000	13,057,000
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Taxes Paid	3,000	1,000
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITIES
Issuance of common stock in settlement of liability	0	119,000
Stock options issued in settlement of liability	0	332,000
Restricted stock units issued in settlement of liability	436,000	0
Prepaids included in accounts payable	0	43,000
Property and equipment included in accounts payable	8,000	3,000
Patents included in accounts payable	35,000	36,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Total cash, cash equivalents and restricted cash	$ 19,624,000	$ 5,184,000