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Condensed Statements of Cash Flows (Unaudited) - USD ($)
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Cash Flows from Operating Activities    
Net loss $ (19,708,975) $ (19,424,558)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 839,794 691,191
Amortization of right-of-use assets (105,534) (113,419)
Inventory reserve 57,350 20,277
Stock-based compensation 503,930 624,769
Warrant inducement expense 2,102,109 1,831,116
Gain on disposal of fixed assets (1,680)  
Increase/(decrease) in cash resulting from changes in:    
Accounts receivable, net (4,427,547) (1,287,334)
Inventory (2,605,153) (120,241)
Prepaid expenses and other current assets 165,353 322,299
Accounts payable 3,853,736 (198,400)
Accrued liabilities 642,516 76,932
Net cash used in operating activities (18,684,101) (17,577,368)
Cash Flows from Investing Activities:    
Purchases of fixed assets (64,331) (297,877)
Net cash used in investing activities (64,331) (297,877)
Cash Flows from Financing Activities:    
Net proceeds from issuance of common stock and warrants 24,193,930 16,779,772
Proceeds from exercise of common stock warrants 2,401,704 2,513,172
Proceeds from warrant exercise inducement, net   2,337,298
Proceeds from exercise of overallotment warrants 659,958  
Payments on finance leases (518,190) (378,389)
Payments on supplier and other third-party financings (432,435) (260,537)
Net cash provided by financing activities 26,304,967 20,991,316
Net increase in Cash 7,556,535 3,116,071
Cash at Beginning of Period 9,301,406 3,423,373
Cash at End of Period 16,857,941 6,539,444
Cash paid during the period for:    
Interest $ 171,891 $ 187,574