Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Unaudited)

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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Current assets    
Cash and cash equivalents $ 21,947,912 $ 23,976,570
Accounts receivable, net 862,235 615,757
Inventory, net 885,855 953,458
Prepaid expenses and other current assets 1,219,759 2,678,894
Total current assets 24,915,761 28,224,679
Right-of-use assets 376,616 430,795
Property and equipment, net 224,932 247,323
Equipment held for lease, net 10,687 17,947
Intangible assets, net 189,294 187,694
Other assets 18,334 18,334
Total Assets 25,735,624 29,126,772
Current liabilities    
Accounts payable 485,551 500,768
Accrued expenses and other current liabilities 1,869,424 746,738
Notes payable, current portion 10,683 131,766
Deferred revenue, current portion 381,366 486,031
Lease liability, current portion 262,601 254,739
Warrant liabilities 6,187,200 8,310,100
Total current liabilities 9,196,825 10,430,142
Notes payable, net of current portion 4,923 6,973
Lease liability, net of current portion 168,254 236,826
Deferred revenue, net of current portion 135,235 158,271
Total liabilities 9,505,237 10,832,212
Stockholders' equity    
Series Alpha convertible preferred stock, $0.001 par value; 7,000 shares authorized; 180 shares issued and outstanding as of March 31, 2021 and December 31, 2020 1 1
Common stock, $0.001 par value; 225,000,000 shares authorized; 28,833,059 shares and 27,296,061 shares issued and outstanding as of March 31, 2021 and December 31, 2020 28,833 27,296
Additional paid-in capital 86,721,672 85,114,755
Accumulated deficit (70,520,119) (66,847,492)
Total stockholders' equity 16,230,387 18,294,560
Total Liabilities and Stockholders' Equity $ 25,735,624 $ 29,126,772