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Statements of Cash Flows - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities    
Net loss $ (6,646,459) $ (4,591,284)
Adjustments to reconcile net loss to cash used in operating activities:    
Depreciation 126,211 122,736
Non-cash lease expense 2,340,428 2,342,344
Share-based compensation 3,169,348 1,330,195
Changes in operating assets and liabilities:    
Accounts receivable 1,814,441 (308,466)
Inventories (1,447,927) (655,864)
Prepaid expenses and other current assets (245,092) (507,222)
Compensating cash arrangement (250,620)
Other assets (90,412) (19,738)
Accounts payable (490,461) 372,737
Accrued liabilities 488,131 560,482
Deferred revenue 184,972 (585,974)
Operating lease liability (2,340,046) (2,290,682)
Other liabilities (124,286) (385,944)
Net cash used in operating activities (3,511,772) (4,616,680)
Cash flows from investing activities    
Purchase of equipment (70,896) (29,486)
Net cash used in investing activities (70,896) (29,486)
Cash flows from financing activities    
Proceeds from Paycheck Protection Program loan 2,158,310
Proceeds from issuance of stock, net of issuance costs 15,181,755 24,032,209
Net cash provided by financing activities 17,340,065 24,032,209
Net increase in cash and cash equivalents 13,757,397 19,386,043
Cash and cash equivalents at beginning of period 30,182,115 10,796,072
Cash and cash equivalents at end of period 43,939,512 30,182,115
Supplemental disclosure of cash flow information:    
Interest Paid