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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Net cash used in operating activities $ (216,202) $ (76,524)
Cash flows from investing activities    
Investment in equipment (1,638)
Investment in patents (1,687)
Net cash used in investing activities (1,638) (1,687)
Cash flows from financing activities    
Payments on convertible notes (37,500) (195,000)
Proceeds from private placement offering 25,000
Net cash used in financing activities (12,500) (195,000)
Net change in cash (230,340) (273,211)
Cash and cash equivalents at beginning of period 1,276,654 1,980,015
Cash and cash equivalents at end of period 1,046,314 1,706,804
Supplemental Cash Flow Information    
Cash paid for interest 69 3,819
Cash paid for income taxes
Non-Cash Transactions    
Stock issued for accrued liabilities $ 82,750 $ 496,736