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Statements of Cash Flows - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Operating activities:    
Net loss $ (633) $ (794)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation   2
Stock-based compensation 212 184
Changes in operating assets and liabilities:    
Prepaid expenses, other current assets and right of use operating assets 80 (149)
Accounts payable and accrued liabilities (88) (125)
Net cash used in operating activities (429) (882)
Decrease in cash and cash equivalents (429) (882)
Cash and cash equivalents at beginning of period 629 1,115
Cash and cash equivalents at end of period 200 $ 233
Supplemental disclosue of non-cash activities    
Initial recognition of right of use operating assets 101  
Initial recognition of facility lease obligations $ 109