Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 2 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Operating activities:          
Net loss   $ (7,653,000) $ (4,239,000) $ (5,779,000) $ (4,281,000)
Adjustments to reconcile net loss to cash used in operating activities:          
Gain on extinguishment of debt   (1,125,000)    
Forgiveness of related party liabilities       (1,745,000)
Forgiveness of liabilities   (139,000) (776,000) (776,000) (551,000)
Impairment of acquired intangible assets       286,000 70,000
Preferred shares penalty fee   653,000    
Depreciation expense   835,000 742,000 971,000 1,030,000
Amortization of debt issuance costs   485,000 392,000 526,000
Share-based compensation   299,000 5,000 5,000 637,000
Preferred shares interest expense, related party       291,000
Provision for losses on accounts receivable       34,000 187,000
Revaluation of subscription agreements   (79,000) (79,000) 158,000
Changes in operating assets and liabilities:          
Accounts receivable   38,000 110,000 71,000 773,000
Inventories   57,000 94,000 195,000 477,000
Accounts payable and accrued liabilities   1,918,000 3,380,000 3,583,000 317,000
Accrued payroll and employee compensation   2,000 66,000 (50,000) 182,000
Deferred revenue   (477,000) (553,000) (597,000) (102,000)
Other assets and liabilities, net   42,000 (1,138,000) (972,000) 744,000
Net cash used in operating activities   (5,065,000) (1,996,000) (2,582,000) (1,813,000)
Investing activities:          
Loan receivable       (2,000,000)
Deposit for purchase of property and equipment   (85,000,000)    
Notes receivable   (10,035,000)    
Investment in special purpose acquisition company, net   (4,420,000)    
Net cash used in investing activities   (99,455,000) (2,000,000)
Financing activities:          
Proceeds from issuance of common shares and warrants, net   194,572,000 115,000 364,000 707,000
Proceeds from debt       1,042,000
Proceeds from issuance of preferred shares, net   9,575,000 2,735,000 2,735,000
Payments for debt   (1,103,000)    
Proceeds from long-term debt   447,000 667,000    
Proceeds from exercise of warrants   1,458,000 120,000 180,000
Payments for line of credit, net   (402,000) (2,000) (83,000) 391,000
Payments for preferred share dividends   (218,000)    
Proceeds from debt-related party   500,000 700,000 523,000
Payments for debt-related party   (42,000) (117,000)
Proceeds from convertible debt   375,000    
Proceeds from convertible debt-related party   200,000    
Proceeds from exercise of stock options   252,000 76,000 75,000
Net cash provided by financing activities   204,581,000 4,744,000 4,896,000 1,621,000
Effect of exchange rate changes on cash   (1,000) (1,000) (2,000)
Net increase (decrease) in cash and cash equivalents   100,060,000 2,747,000 312,000 (192,000)
Cash and cash equivalents, beginning of year   461,000 149,000 149,000 341,000
Cash and cash equivalents, end of year $ 461,000 100,521,000 2,896,000 461,000 149,000
Supplemental disclosures of cash flow information:          
Cash paid for interest   34,000 25,000 33,000 39,000
Issuance of common shares for settlement of liabilities and preferred dividends   3,704,000 2,034,000    
Issuance of common shares for conversion of convertible debt   799,000 783,000 783,000
Issuance of common shares for related party liabilities       379,000 529,000
Issuance of common shares for exercise of warrants applied to settlement of liabilities   92,000    
Issuance of common shares for settlement of liabilities       2,034,000 764,000
Issuance of common shares for acquisition of intangible asset   11,408,000 1,560,000 1,560,000
Assumption of notes receivable       1,100,000
Issuance of convertible debt-related party for prepaid business advisory services   150,000 150,000
Conversion of related party accrued interest to Series B preferred shares       344,000
Conversion of related party liabilities to Series C preferred shares       1,152,000
Issuance of Series C preferred shares for prepayment of services       $ 448,000
Issuance of common shares for settlement of related party liabilities   $ 379,000    
Gryphon Digital Mining, Inc.          
Operating activities:          
Net loss (2,000) (14,403,000)      
Adjustments to reconcile net loss to cash used in operating activities:          
Unrealized loss on impairment of digital assets   130,000      
Interest earned on digital assets   (25,000)      
Realized gain from disposition of digital assets   (36,000)      
Digital assets used for operating expenses   168,000      
Amortization of debt discount   428,000      
Depreciation expense   26,000      
Common stock issued for compensation   830,000      
Common stock issued for compensation to seed stage advisors   1,671,000      
Common stock issued for compensation to officers and directors   7,655,000      
Compensation cost related to restricted common stock awards   874,000      
Series seed II Preferred Stock issued for compensation   110,000      
Compensation for services contributed by the Company’s president   188,000      
Fair value of penny warrants issued for services   1,036,000      
Changes in operating assets and liabilities:          
Accounts receivable   (136,000)      
Prepaid expense (1,000) (85,000)      
Accounts payable and accrued liabilities   618,000      
Net cash used in operating activities (3,000) (951,000)      
Investing activities:          
Net cash used in investing activities   (27,253,000)      
Financing activities:          
Proceeds from issuance of notes payable   10,000,000      
Proceeds from issuance of convertible debentures   9,079,000      
Proceeds from collection of subscription receivable   4,000      
Proceeds from issuance of common stock 15,000 12,905,000      
Proceeds from additional capital contributions   16,000      
Proceeds from issuance of series seed II preferred stock   1,473,000      
Proceeds from exercise of warrants   1,000      
Proceeds from the issuance of series seed preferred stock   300,000      
Net cash provided by financing activities 15,000 33,778,000      
Net increase (decrease) in cash and cash equivalents 12,000        
Cash and cash equivalents, beginning of year 12,000      
Cash and cash equivalents, end of year 12,000 5,586,000   $ 12,000  
Net change in cash   5,574,000      
Supplemental disclosures of cash flow information:          
Cash paid for interest      
Cash paid for income taxes      
Non-cash investing and financing activities        
Deposits used for purchase of mining equipment   3,656,000      
Digital assets received for purchase of common stock and Series Seed II   1,374,000      
Relative fair value of warrants issued with convertible notes   4,490,000      
Digital assets used as deposits for mining equipment   1,067,000      
Supplemental disclosures of non-cash financing activities:          
Deposit for purchase of bitcoin mining machines $ (14,192,000) (27,093,000)      
Deposits   $ (160,000)