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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities:    
Net loss $ (32,728,629) $ (32,945,828)
Less: Net gain (loss) from discontinued operations 661,248 (2,244,668)
Net loss from continuing operations (33,389,877) (30,701,160)
Adjustments to reconcile net loss to net cash (used in) operating activities:    
Depreciation 391,597 2,570,511
Amortization 335,776 502,656
Amortization of right-of-use assets (140,188) 2,123,519
Interest expense - debt discount 7,251,365 3,709,993
Loss on extinguish debt 18,706,488
Fair value in excess of proceeds upon issuance of warrants 1,763,481
Change in fair value of warrant liability 48,842 (1,124,953)
Accretion of original issue discount on notes receivable - related party 21,998 (2,277,777)
Accretion of original issue discount on notes receivable (61,834) (90,489)
Increase in accrued interest on notes receivable - related party (1,337) (1,021,158)
Stock-based compensation 1,105,688 1,583,991
Impairment of property and equipment 4,315,856
Impairment of intangible assets 170,692
Impairment of goodwill 480,953
Realized losses on other investments 39,141
Realized (gains) losses on sale of digital currencies (524)
Realized (gains) losses on sale of marketable securities (75,346) (95,340)
Realized (gains) losses on equity securities in private companies 215,813
Unrealized (gains) losses on marketable equity securities (796,009) (258,905)
Unrealized (gains) losses on equity securities - related party (297,943) 276,450
Unrealized (gains) losses on equity securities 73,079 363,996
Provision for loan losses (2,000,000) 5,550,000
Changes in operating assets and liabilities:    
Accounts receivable (641,087) (540,820)
Accounts receivable, related party 2,691,275
Accrued revenue 644,729 (737,960)
Digital currencies (14) (647,260)
Inventories 183,331 824,703
Prepaid expenses and other current assets (1,612,731) (1,018,466)
Other assets (92,753) (221,264)
Accounts payable and accrued expenses (364,195) 3,682,230
Accounts payable, related parties (28,917) 6,852
Other current liabilities (649,615) (269,831)
Lease liabilities 167,587 (2,089,797)
Net cash used in continuing operating activities (11,182,225) (10,262,733)
Net cash provided by discontinued operating activities 1,246 82,179
Net cash used in operating activities (11,180,979) (10,180,554)
Cash flows from investing activities:    
Purchase of property and equipment (582,092) (189,302)
Acquisition of Relec, net of cash acquired (3,627,534)
Investments - related party (2,118,411) (1,600,164)
Investments in warrants and common stock - related party (354,370) (1,130,567)
Purchase of marketable equity securities (1,425,341)
Sales of marketable equity securities 373,360 580,721
Proceeds from loans receivable 139,933
Investments in debt and equity securities (188,760) (511,743)
Net cash used in investing activities (7,783,215) (2,851,055)
Cash flows from financing activities:    
Gross proceeds from sales of common stock and warrants 39,978,350 17,028,605
Proceeds from issuance of Series A Convertible Preferred Stock 131,741
Financing cost in connection with sales of equity securities (1,651,835) (1,445,255)
Proceeds from warrant exercises 52,826 127,000
Proceeds from convertible notes payable 100,000 500,000
Proceeds from notes payable 9,722,434 5,230,418
Proceeds from short-term advances 570,000
Payments on short-term advances (570,000)
Proceeds from short-term advances - related party 653,124 1,305,570
Payments on short-term advances - related party (322,507)
Payments on notes payable (8,783,976) (2,117,252)
Payments on convertible notes payable (7,069,547)
Proceeds from advances on future receipts 941,804
Payments on advances on future receipts (2,350,639) (1,590,925)
Payments of preferred dividends (17,621) (15,938)
Payments on revolving credit facilities, net (96,517) (101,018)
Net cash provided by financing activities 37,283,639 12,925,203
Effect of exchange rate changes on cash and cash equivalents (122,980) (179,830)
Net increase (decrease) in cash and cash equivalents 18,196,465 (286,236)
Cash and cash equivalents at beginning of period 483,383 769,619
Cash and cash equivalents at end of period 18,679,848 483,383
Supplemental disclosures of cash flow information:    
Cash paid during the period for interest 658,042 1,867,925
Non-cash investing and financing activities:    
Cancellation of convertible note payable into shares of common stock 24,780,720 4,736,295
Payment of accounts payable with digital currency 647,213
Issuance of common stock in payment of accrued liability 1,537,494 175,377
Cancellation of short-term advances, related party into shares of common stock 739,948
Conversion of loans receivable for marketable equity securities 485,000
Conversion of loans receivable for investments in warrants and common stock - related party 181,483
Issuance of notes payable and convertible notes payable in payment of accrued expenses 420,000
Cancellation of notes payable into short term advances, related parties 30,000
Issuance of common stock on conversion of note $ 600,000