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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Sales, net $ 90,692 $ 120,301 $ 115,308
Depreciation and amortization 17,413 19,549 14,616
Reclamation and remediation 166 64 330
Total mine cost of sales 78,205 91,669 81,618
Mine gross profit 12,487 28,632 33,690
Costs and expenses:      
General and administrative expenses 8,402 8,017 7,828
Restructuring expenses 1,316    
Non-cash compensation expense related to stock options included in general and administrative expense 2,230 1,932 1,497
Other (income) expense, net (1,188) 464 2,934
Total costs and expenses 13,245 13,133 14,647
(Loss) income before income taxes (758) 15,499 19,043
Provision for income taxes 5,573 9,967 7,169
Net (loss) income from continuing operations (6,331) 5,532 11,874
Net income (loss) from discontinued operations, net of income taxes 10,690 300 (2,586)
Net income $ 4,359 $ 5,832 $ 9,288
Net income per common share:      
Basic net (loss) income per common share from continuing operations $ (0.09) $ 0.09 $ 0.21
Basic net income (loss) per common share from discontinued operations 0.15   (0.04)
Basic net income (loss) per common share 0.06 0.09 0.17
Diluted net (loss) income per common share from continuing operations (0.09) 0.09 0.20
Diluted net income (loss) per common share from discontinued operations 0.15   (0.04)
Diluted net income per common share $ 0.06 $ 0.09 $ 0.16
Weighted average shares outstanding:      
Basic 69,902,708 63,681,156 57,534,830
Diluted 70,686,243 64,032,990 58,369,666
Production costs      
Total mine cost of sales $ 60,626 $ 72,056 $ 66,672
Exploration expenses      
Costs and expenses:      
Total costs and expenses $ 2,485 $ 2,720 $ 2,388