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New Jersey Mining Company Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Cash flows from operating activities:    
Net income (loss) $ (1,662,404) $ (162,189)
Depreciation and amortization 182,795 135,533
Loss on write off of equipment 0 9,537
Accretion of asset retirement obligation 2,498 2,355
Stock based compensation 614,431 0
Issuance of commons stock for services 2,300 0
Change in operating assets and liabilities:    
Gold sales receivable 155,622 29,433
Inventories 96,961 6,292
Joint venture receivable 1,708 (249)
Other current assets 26,353 40,550
Accounts payable and other accrued liabilities (142,954) (38,467)
Accrued payroll and related payroll expenses 3,523 1,388
Net cash provided (used) by operating activities (719,167) 24,183
Cash flows from investing activities:    
Purchases of property, plant and equipment (57,111) (11,549)
Refund of deposits on equipment 7,953 0
Purchase of mineral property (140,716) (726,101)
Net cash used by investing activities (189,874) (737,650)
Cash flows from financing activities:    
Principal payments on notes payable (111,934) (74,096)
Principal payments on notes payable, related parties (9,063) (17,964)
Issuance of convertible debt 1,600,000 885,000
Contributions from non-controlling interest 2,469 2,659
Net cash provided by financing activities 1,481,472 795,599
Net change in cash and cash equivalents 572,431 82,132
Cash and cash equivalents, beginning of period 2,539,945 217,796
Cash and cash equivalents, end of period 3,112,376 299,928
Non-cash investing and financing activities:    
Deposit on property applied to purchase of mineral property 0 25,000
Note payable for equipment purchase $ 761,073 $ 0