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Condensed Consolidated Balance Sheets - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 9,064,385 $ 4,241,937
Marketable securities 16,388,339 18,386,160
Accounts receivable, net 259,319 270,546
Inventories, net 944,715 876,436
Prepaid expenses and other current assets 936,080 1,288,588
Total current assets 27,592,838 25,063,667
Inventories, noncurrent 4,678,013 4,865,181
Property and equipment, net 220,307 244,047
Operating lease right of use assets 502,108 517,257
Other assets, net 756,953 828,011
Total assets 33,750,219 31,518,163
Current liabilities:    
Accounts payable 2,110,288 2,078,699
Accrued expenses 2,152,152 2,800,820
Note payable, current 545,551 476,236
Current portion of operating lease liabilities 537,002 534,547
Total current liabilities 5,344,993 5,890,302
Noncurrent liabilities:    
Operating lease liabilities, noncurrent 874,003 885,333
Note payable, noncurrent 863,799 1,097,946
Total liabilities 7,082,795 7,873,581
Commitments and contingencies
Stockholders' equity:    
Preferred Stock, par value $0.001 per share; 10,000,000 shares authorized at March 31, 2021 and December 31, 2020; 0 shares issued and outstanding at March 31, 2021 and December 31, 2020
Common Stock, par value $0.001 per share; 500,000,000 shares authorized at March 31, 2021 and December 31, 2020; 48,492,777 shares issued and outstanding at March 31, 2021 and 45,559,765 shares issued and outstanding at December 31, 2020 48,493 45,560
Additional paid-in capital 138,464,624 130,205,027
Accumulated deficit (112,373,980) (106,990,148)
Accumulated other comprehensive loss (107,323) (251,467)
Total stockholders' equity 26,031,814 23,008,972
Noncontrolling interest 635,610 635,610
Total equity 26,667,424 23,644,582
Total liabilities and equity $ 33,750,219 $ 31,518,163