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Consolidated Balance Sheets - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Current assets:    
Cash and cash equivalents $ 7,630,376 $ 2,990,196
Certificate of deposit 12,606 12,361
Other receivables 136,903 115,982
Inventory 159,131 76,109
Prepaid expenses and other current assets 261,176 315,969
Total current assets 8,200,192 3,510,617
Property, plant and equipment, net 23,934,625 23,716,768
Right of use asset, net 454,890 0
Definite-lived intangible assets, net 167,866 171,292
Indefinite-lived intangible assets 191,800 191,800
Other assets 80,583 80,583
Total assets 33,029,956 27,671,060
Current liabilities:    
Accounts payable and accrued liabilities 958,058 824,900
Other current liabilities 84,253 20,423
Current debt 90,200 71,613
Total current liabilities 1,132,511 916,936
Long-term lease obligations 399,935 0
Long-term debt 3,941,010 3,519,821
Total liabilities 5,473,456 4,436,757
Commitments and contingencies
Stockholders’ equity:    
Common stock, $0.001 par value, 50,000,000 shares authorized; 18,697,477 (2018: 15,098,837) shares outstanding 18,697 15,099
Additional paid-in capital 149,702,936 142,707,957
Accumulated other comprehensive loss (486,635) (574,186)
Accumulated deficit (121,678,498) (118,914,567)
Total stockholders’ equity 27,556,500 23,234,303
Total liabilities and stockholders’ equity $ 33,029,956 $ 27,671,060