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Schedule of Operating Segments (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Assets:                
Goodwill $ 2,946,000     $ 2,946,000     $ 2,946,000 $ 2,946,000
All other assets, net 14,742,000     18,386,000     14,742,000 18,386,000
Total assets 17,688,000     21,332,000     17,688,000 21,332,000
Revenues:                
Total revenues 7,011,000     7,265,000     18,404,000 18,752,000
Costs of revenues:                
Total costs of revenues 4,145,000     4,085,000     10,889,000 11,045,000
Gross profit 2,866,000     3,180,000     7,515,000 7,707,000
Depreciation & amortization 153,000     191,000     488,000 583,000
Other operating expenses 1,767,000     1,915,000     5,253,000 5,114,000
 Segment operating income/(loss) 946,000     1,074,000     1,774,000 2,010,000
Other items to reconcile segment operating income (loss) to net income/(loss):                
Other income / (expense) 63,000     9,000     182,000 73,000
Income tax expense (286,000)     (298,000)     (580,000) (579,000)
Net income/(loss) 723,000 $ 532,000 $ 121,000 785,000 $ 222,000 $ 497,000 1,376,000 1,504,000
Service [Member]                
Revenues:                
Total revenues 5,359,000     5,169,000     13,944,000 12,917,000
Costs of revenues:                
Total costs of revenues 3,123,000     2,900,000     8,055,000 7,261,000
Product [Member]                
Revenues:                
Total revenues 1,221,000     1,588,000     3,130,000 3,473,000
Costs of revenues:                
Total costs of revenues 681,000     826,000     1,804,000 1,885,000
Consulting Revenue [Member]                
Revenues:                
Total revenues 431,000     508,000     1,330,000 2,362,000
Costs of revenues:                
Total costs of revenues 341,000     359,000     1,030,000 1,899,000
Verification and Certification Segment [Member]                
Assets:                
Goodwill 1,947,000     1,947,000     1,947,000 1,947,000
All other assets, net 5,252,000     14,134,000     5,252,000 14,134,000
Total assets 7,199,000     16,081,000     7,199,000 16,081,000
Revenues:                
Total revenues 6,580,000     6,757,000     17,074,000 16,390,000
Costs of revenues:                
Total costs of revenues 3,804,000     3,726,000     9,859,000 9,146,000
Gross profit 2,776,000     3,031,000     7,215,000 7,244,000
Depreciation & amortization 111,000     149,000     361,000 443,000
Other operating expenses 1,682,000     1,855,000     5,027,000 4,929,000
 Segment operating income/(loss) 983,000     1,027,000     1,827,000 1,872,000
Other items to reconcile segment operating income (loss) to net income/(loss):                
Other income / (expense) 65,000     9,000     187,000 108,000
Income tax expense        
Net income/(loss) 1,048,000     1,036,000     2,014,000 1,980,000
Verification and Certification Segment [Member] | Service [Member]                
Revenues:                
Total revenues 5,359,000     5,169,000     13,944,000 12,917,000
Costs of revenues:                
Total costs of revenues 3,123,000     2,900,000     8,055,000 7,261,000
Verification and Certification Segment [Member] | Product [Member]                
Revenues:                
Total revenues 1,221,000     1,588,000     3,130,000 3,473,000
Costs of revenues:                
Total costs of revenues 681,000     826,000     1,804,000 1,885,000
Verification and Certification Segment [Member] | Consulting Revenue [Member]                
Revenues:                
Total revenues        
Costs of revenues:                
Total costs of revenues        
Consulting Segment [Member]                
Assets:                
Goodwill 999,000     999,000     999,000 999,000
All other assets, net 2,686,000     3,367,000     2,686,000 3,367,000
Total assets 3,685,000     4,366,000     3,685,000 4,366,000
Revenues:                
Total revenues 431,000     508,000     1,330,000 2,362,000
Costs of revenues:                
Total costs of revenues 341,000     359,000     1,030,000 1,899,000
Gross profit 90,000     149,000     300,000 463,000
Depreciation & amortization 42,000     42,000     127,000 140,000
Other operating expenses 85,000     60,000     226,000 185,000
 Segment operating income/(loss) (37,000)     47,000     (53,000) 138,000
Other items to reconcile segment operating income (loss) to net income/(loss):                
Other income / (expense) (2,000)         (5,000) (35,000)
Income tax expense        
Net income/(loss) (39,000)     47,000     (58,000) 103,000
Consulting Segment [Member] | Service [Member]                
Revenues:                
Total revenues        
Costs of revenues:                
Total costs of revenues        
Consulting Segment [Member] | Product [Member]                
Revenues:                
Total revenues        
Costs of revenues:                
Total costs of revenues        
Consulting Segment [Member] | Consulting Revenue [Member]                
Revenues:                
Total revenues 431,000     508,000     1,330,000 2,362,000
Costs of revenues:                
Total costs of revenues 341,000     359,000     1,030,000 1,899,000
Eliminations and Other [Member]                
Assets:                
Goodwill        
All other assets, net 6,804,000     885,000     6,804,000 885,000
Total assets 6,804,000     885,000     6,804,000 885,000
Revenues:                
Total revenues        
Costs of revenues:                
Total costs of revenues        
Gross profit        
Depreciation & amortization        
Other operating expenses        
 Segment operating income/(loss)        
Other items to reconcile segment operating income (loss) to net income/(loss):                
Other income / (expense)        
Income tax expense (286,000)     (298,000)     (580,000) (579,000)
Net income/(loss) (286,000)     (298,000)     (580,000) (579,000)
Eliminations and Other [Member] | Service [Member]                
Revenues:                
Total revenues        
Costs of revenues:                
Total costs of revenues        
Eliminations and Other [Member] | Product [Member]                
Revenues:                
Total revenues        
Costs of revenues:                
Total costs of revenues        
Eliminations and Other [Member] | Consulting Revenue [Member]                
Revenues:                
Total revenues        
Costs of revenues:                
Total costs of revenues