v3.8.0.1
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Cash flows from operating activities:    
Net loss $ (7,605) $ (3,894)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 6 9
Stock-based compensation 887 833
Changes in assets and liabilities:    
Accounts receivables (6) 0
Prepaid expenses and other current assets (279) (185)
Prepaid expense - non-current 82 0
Accounts payable 3,331 (1,155)
Related party payable 258 0
Accrued payroll and related expenses (1,970) (1,372)
Income tax liability 5 5
Deferred revenue 2 (375)
Net cash used in operating activities (5,289) (6,134)
Cash flows from investing activities:    
Purchase of investments (282) 0
Proceeds from sale or maturity of investments 1,154 3,116
Net cash provided by investing activities 872 3,116
Cash flows from financing activities:    
Proceeds from sale of common stock 6,830 0
Payments of taxes on restricted stock units (4) 0
Net cash provided by financing activities 6,826 0
Net increase (decrease) in cash and cash equivalents 2,409 (3,018)
Cash and cash equivalents, beginning of period 3,135 6,627
Cash and cash equivalents, end of period 5,544 3,609
Cash paid for income taxes $ 0 $ 0