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The Company’s disaggregated revenues consist of the following for the three months ended September 30, 2021: (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers $ 8,075,000 $ 5,705,000 $ 24,965,000 $ 16,709,000
Revenue, lending and trading activities (38,869,000) (29,000) 19,615,000 (27,000)
Total revenue (30,794,000) 5,676,000 44,580,000 16,682,000
R F Microwave Filters [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 630,000 1,341,000 2,921,000 3,887,000
Detectorlogarithmicvideoamplifiers [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 905,000 441,000 1,049,000 1,319,000
Power Supply Units [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 2,350,000 1,376,000 6,042,000 3,803,000
Power Supply Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 545,000 316,000 5,253,000 863,000
Healthcare Diagnostic Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 97,000 262,000 510,000 785,000
Defense Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 2,940,000 1,969,000 7,731,000 6,052,000
Digital Currency Mining [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 272,000   693,000  
Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 336,000   766,000  
Goods Transferred At A Point In Time [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 5,037,000 3,443,000 16,724,000 9,844,000
Services Transferred Over Time [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 3,037,000 2,233,000 8,241,000 6,838,000
North America [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 3,126,000 2,876,000 10,503,000 8,212,000
Europe [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,751,000 247,000 5,918,000 982,000
Middle East [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 2,949,000 2,233,000 7,845,000 6,838,000
Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 249,000 349,000 699,000 677,000
G W W [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 6,373,000 4,329,000 19,198,000 12,906,000
Revenue, lending and trading activities  
Total revenue 6,373,000 4,329,000 19,198,000 12,906,000
G W W [Member] | R F Microwave Filters [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 630,000 1,341,000 2,921,000 3,887,000
G W W [Member] | Detectorlogarithmicvideoamplifiers [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 905,000 441,000 1,049,000 1,319,000
G W W [Member] | Power Supply Units [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,256,000 1,734,000
G W W [Member] | Power Supply Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 545,000 316,000 5,253,000 863,000
G W W [Member] | Healthcare Diagnostic Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 97,000 262,000 510,000 785,000
G W W [Member] | Defense Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 2,940,000 1,969,000 7,731,000 6,052,000
G W W [Member] | Digital Currency Mining [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers      
G W W [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers    
G W W [Member] | Goods Transferred At A Point In Time [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 3,336,000 2,096,000 10,957,000 6,068,000
G W W [Member] | Services Transferred Over Time [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 3,037,000 2,233,000 8,241,000 6,838,000
G W W [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,415,000 1,740,000 5,444,000 5,110,000
G W W [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,848,000 246,000 5,600,000 694,000
G W W [Member] | Middle East [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 2,949,000 2,233,000 7,845,000 6,838,000
G W W [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 161,000 110,000 309,000 264,000
Turn On Green [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,094,000 1,376,000 4,308,000 3,803,000
Revenue, lending and trading activities  
Total revenue 1,094,000 1,376,000 4,308,000 3,803,000
Turn On Green [Member] | R F Microwave Filters [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
Turn On Green [Member] | Detectorlogarithmicvideoamplifiers [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
Turn On Green [Member] | Power Supply Units [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,094,000 1,376,000 4,308,000 3,803,000
Turn On Green [Member] | Power Supply Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
Turn On Green [Member] | Healthcare Diagnostic Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
Turn On Green [Member] | Defense Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
Turn On Green [Member] | Digital Currency Mining [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers      
Turn On Green [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers    
Turn On Green [Member] | Goods Transferred At A Point In Time [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,094,000 1,376,000 4,308,000 3,803,000
Turn On Green [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 1,103,000 1,136,000 3,600,000 3,102,000
Turn On Green [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers (97,000) 1,000 318,000 288,000
Turn On Green [Member] | Middle East [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
Turn On Green [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 88,000 239,000 390,000 413,000
D P Lending [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 608,000 1,459,000
Revenue, lending and trading activities (38,869,000) (29,000) 19,615,000 (27,000)
Total revenue (38,261,000) (29,000) 21,074,000 (27,000)
D P Lending [Member] | R F Microwave Filters [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
D P Lending [Member] | Detectorlogarithmicvideoamplifiers [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
D P Lending [Member] | Power Supply Units [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
D P Lending [Member] | Power Supply Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
D P Lending [Member] | Healthcare Diagnostic Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
D P Lending [Member] | Defense Systems [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
D P Lending [Member] | Digital Currency Mining [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 272,000   693,000  
D P Lending [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 336,000   766,000  
D P Lending [Member] | Goods Transferred At A Point In Time [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 607,000 (29,000) 1,459,000 (27,000)
D P Lending [Member] | North America [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers 608,000 1,459,000
D P Lending [Member] | Europe [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
D P Lending [Member] | Middle East [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers
D P Lending [Member] | Other [Member]        
Disaggregation of Revenue [Line Items]        
Revenue from contracts with customers