Note 3 - Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Property, Plant and Equipment [Table Text Block]

	September 30, 2018			December 31, 2017
Plant and equipment at cost	$	104,389,458		$	80,454,977
Construction in process		15,150,635			7,625,855
Capitalized mine development cost		37,068,316			30,775,765
Less: Accumulated depreciation and amortization		(12,138,180	)		(3,405,756	)
Total property, plant and equipment, net	$	144,470,229		$	115,450,841