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Condensed Consolidated Balance Sheets - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Current assets:    
Cash and cash equivalents $ 75,509,793 $ 88,454,988
Marketable securities 103,365,156 101,773,781
Inventory 1,675,682 1,259,910
Prepaid expenses and other current assets 1,695,159 1,536,484
Total current assets 182,245,790 193,025,163
Property, plant and equipment, net 37,828,165 33,815,119
Right of use assets, net 269,426 284,320
Intangible assets, net 228,417 231,842
Restricted cash 1,000,000 1,000,000
Other assets 75,957 79,548
Total assets 221,647,755 228,435,992
Current liabilities:    
Accounts payable and accrued liabilities 2,913,028 4,317,615
Accrued employee compensation 512,173 874,589
Current debt 657,828 627,365
Other current liabilities 67,497 66,269
Total current liabilities 4,150,526 5,885,838
Long-term lease obligations 206,734 224,058
Long-term debt, net 8,419,290 8,523,333
Total liabilities 12,776,550 14,633,229
Commitments and contingencies
Stockholders’ equity:    
Common stock, $0.001 par value, 80,000,000 shares authorized at March 31, 2022 and December 31, 2021; 71,109,701 and 71,025,738 shares outstanding at March 31, 2022 and December 31, 2021, respectively 71,110 71,026
Additional paid-in capital 385,063,351 384,852,107
Accumulated other comprehensive loss (286,748) (255,588)
Accumulated deficit (175,976,508) (170,864,782)
Total stockholders’ equity 208,871,205 213,802,763
Total liabilities and stockholders’ equity $ 221,647,755 $ 228,435,992