CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
OPERATING ACTIVITIES:    
Net income (loss) $ (220,332) $ (7,213,566)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Depreciation, amortization and depletion 3,836,092 3,299,133
Stock payments and stock-based compensation 44,400 1,193,265
Accretion of reclamation liability 130,653 171,943
(Gain) loss on sale of properties, plant, and equipment 77,579 45,499
Amortization of debt discounts and issuance costs 315,735 300,924
Net change in fair values of derivatives 74,271 279,170
Changes in operating assets and liabilities:    
Accounts receivable 263,453 (190,086)
Inventories 83,511 83,833
Stockpiles and mineralized material on leach pads (105,213) (62,530)
Prepaid expenses (690,599) (213,291)
Other assets 12,941 12,939
Accounts payable (625,432) 191,462
Accrued expenses (2,828,946) (180,049)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES 368,113 (2,281,354)
INVESTING ACTIVITIES:    
Proceeds from sale of properties, plant and equipment 117,065 155,120
Purchase of mineral rights and properties, plant and equipment (3,750,271) (1,450,794)
Increase in reclamation bond deposit (100,000) (600,000)
NET CASH USED IN INVESTING ACTIVITIES (3,733,206) (1,895,674)
FINANCING ACTIVITIES:    
Principal payments on long-term debt and capital lease obligations (4,579,697) (1,529,648)
Proceeds from long-term debt obligations 9,419,392 4,626,289
Proceeds from the issuance of common stock 0 10,993,283
Common stock issuance costs 0 (96,049)
NET CASH PROVIDED BY FINANCING ACTIVITIES 4,839,695 13,993,875
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 1,474,602 9,816,847
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 5,308,804 2,409,446
CASH AND CASH EQUIVALENTS, END OF PERIOD 6,783,406 12,226,293
SUPPLEMENTAL CASH FLOW INFORMATION:    
Cash paid for interest 507,592 375,389
Supplemental disclosure of non-cash investing and financing activities:    
Conversion of convertible preferred stock to common stock (par value) 0 1
Reclamation bond deposit included in accrued expenses and other liabilities 0 973,982
Additions to reclamation liability and retirement obligation asset 659,295 0
Issuance of common stock for properties, plant and equipment 16,049 0
Dividends paid in common stock (par value) 1,723 767
Issuance of long-term debt obligations for purchase of mineral rights and properties, plant and equipment 197,515 1,314,644
Vested restricted common stock (par value) 40 517
Properties, plant and equipment purchases in accounts payable $ 42,693 $ 87,060