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Consolidated Balance Sheets - USD ($)
Jun. 30, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 3,518,806 $ 492,861
Certificate of deposit 12,820 13,422
Other receivables 101,328 183,926
Inventory 82,429 172,363
Prepaid expenses and other current assets 394,594 527,322
Total current assets 4,109,977 1,389,894
Property, plant and equipment, net 23,617,701 21,802,976
Definite-lived intangible assets, net 178,143 184,995
Indefinite-lived intangible assets 191,800 191,800
Other assets 162,093 162,093
Total assets 28,259,714 23,731,758
Current liabilities:    
Accounts payable and accrued liabilities 1,168,875 2,666,855
Current debt 58,377 49,794
Total current liabilities 1,227,252 2,716,649
Long-term debt 2,932,573 3,034,420
Total liabilities 4,159,825 5,751,069
Commitments and contingencies
Stockholders’ equity:    
Common stock, $0.001 par value, 50,000,000 shares authorized; 12,848,376 (2017: 8,895,094) shares outstanding 12,848 8,895
Additional paid-in capital 138,262,298 126,718,186
Accumulated other comprehensive loss (411,813) (213,884)
Accumulated deficit (113,763,444) (108,532,508)
Total stockholders’ equity 24,099,889 17,980,689
Total liabilities and stockholders’ equity $ 28,259,714 $ 23,731,758