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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES    
Net Loss $ (13,341) $ (10,041)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 554 502
Deferred tax benefit (40) 0
Stock-based compensation 2,024 1,350
Non-cash investment income 0 (2)
Non-cash patent write-off 0 14
Changes in assets and liabilities:    
Accounts receivable (9) (16)
Prepaids and other current assets (112) (18)
Other assets (3) 0
Accounts payable 113 274
Accrued expenses 86 123
Accrued salaries and payroll related expenses 159 49
Deferred revenue (67) 208
Deferred rent (12) (26)
Net cash used in operating activities (10,648) (7,583)
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchases of property and equipment (494) (375)
Expenditures for patents and domain names (244) (176)
Payment for acquisition of business assets, net of acquired cash   (452)
Redemption of investments held-to-maturity 4,747 5,255
Purchase of investments held-to-maturity 0 (12,249)
Net cash provided by (used in) investing activities 4,009 (7,997)
CASH FLOWS FROM FINANCING ACTIVITIES    
Net proceeds from the sale of common stock from private placement offering 15,025 5,177
Net proceeds from the sale of common stock from underwritten public offering 0 10,621
Proceeds from the exercise of stock options 54 0
Net cash provided by financing activities 15,079 15,798
Effects of currency translation on cash 6 0
NET INCREASE IN CASH AND CASH EQUIVALENTS 8,446 218
CASH AND CASH EQUIVALENTS — Beginning of period 5,084 2,501
CASH AND CASH EQUIVALENTS — End of period 13,530 2,719
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
Issuance of common stock in acquisition of business assets 0 545
Accrued consideration for acquisition of business assets 0 61
Stock options issued in settlement of liability 580 0
Property and equipment included in accounts payable 30 0
Patents included in accounts payable $ 33 $ 0