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Statements of Cash Flows - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:    
Net loss $ (7,537,845) $ (6,914,992)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 551,092 560,801
Amortization 39,976 118,852
Amortization of discount on investments 0 (1,189)
Amortization of right-of-use assets 373,219 421,111
Inventory reserve 540 5,800
Share-based compensation expense 193,366 318,640
Loan and accrued interest forgiveness on note payable (821,515) 0
Loss on fixed asset disposition 3,098 0
Changes in operating assets and liabilities:    
Accounts receivable 41,532 (42,236)
Inventory (77,432) 35,319
Other assets 475,993 79,442
Accounts payable (228,811) 80,755
Accrued expenses and other (504,799) 765,421
Lease liabilities (413,212) (445,733)
Other liabilities (25,987) 84,994
Net cash used in operating activities (7,930,785) (4,933,015)
Cash flows from investing activities:    
Maturities of short-term investments 0 1,000,000
Purchases of furniture and equipment (306,868) (8,352)
Payments for patents and other intangible assets 0 (23,329)
Net cash (used in) provided by investing activities (306,868) 968,319
Cash flows from financing activities:    
Payments of deferred offering costs (1,578,643) (75,000)
Proceeds from issuance of common stock 31,740,046 153,200
Proceeds from note payable 0 812,500
Repayment of note payable (442,086) 0
Payments under lease obligations (20,861) (19,052)
Net cash provided by financing activities 29,698,456 871,648
Net change in cash and cash equivalents 21,460,803 (3,093,048)
Cash and cash equivalents:    
Beginning of year 3,322,226 6,415,274
End of year 24,783,029 3,322,226
Cash paid for:    
Interest 15,865 6,900
Income taxes 800 2,000
Non-cash investing and financing activities:    
Conversion of convertible preferred stock to common stock 55,360,897 0
Deferred offering costs included in accounts payable and accrued expenses 0 127,479
Prepaid insurance financed with promissory notes $ 181,123 $ 0