XML 17 R6.htm IDEA: XBRL DOCUMENT v3.21.2
Condensed Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Operating Activities:    
Net loss $ (2,892,597) $ (1,776,478)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 34,383 21,552
Common stock issued for services 368,780 168,136
Compensation expense related to grant of stock options 126,588 54,136
Amortization of debt discount 0 5,990
Amortization of operating lease right of use asset 19,290 (24,578)
Increase (decrease) in:    
Accounts receivable (1,021,591) (64,944)
Prepaid expenses and other current assets 24,790 (262,944)
Inventory (827,868) (308,438)
Deposits 0 6,250
Accounts payable 348,965 (126,018)
Accrued expenses 4,082 168,241
Convertible note payable repaid in lieu of salary - related party 0 (220,417)
Sales tax payable 16,271 16,211
Deferred revenue 48,258 (13,426)
Net cash used in operating activities (3,750,649) (2,356,727)
Investing Activities:    
Purchases of equipment (168,225) (140,241)
Funding of patent costs (37,779) (44,082)
Net cash used in investing activities (206,004) (184,323)
Financing Activities:    
Repayments of auto loan 0 (5,473)
Borrowings on note payable - Paycheck Protection Program 0 339,262
Withhold shares to cover taxes for cashless stock option exercise (81,039) 0
Proceeds from warrant exercises 2,643,494 317,185
Payments of equity offering costs 0 (6,986)
Net cash provided by financing activities 2,562,455 643,988
Net decrease in cash (1,394,198) (1,897,062)
Cash at beginning of period 26,702,804 3,849,456
Cash at end of period 25,308,606 1,952,394
Supplemental Disclosure of Cash Flow Information:    
Cash paid for interest 0 52,671
Cash paid for taxes 825 800
Supplemental Disclosure of Non-Cash Investing and Financing Activities:    
Transfer of prepaid asset to inventory 0 116,400
Depreciation cost capitalized into inventory $ 16,029 $ 9,554