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Schedule of Operating Segments (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Assets:            
Goodwill $ 2,946,000   $ 2,946,000   $ 2,946,000 $ 2,946,000
All other assets, net 14,728,000   17,966,000   14,728,000 17,966,000
Total assets 17,674,000   20,912,000   17,674,000 20,912,000
Revenues:            
Total revenues 6,126,000   5,331,000   11,393,000 11,487,000
Costs of revenues:            
Total costs of revenues 3,620,000   3,201,000   6,744,000 6,960,000
Gross profit 2,506,000   2,130,000   4,649,000 4,527,000
Depreciation & amortization 163,000   197,000   335,000 392,000
Other operating expenses 1,670,000   1,620,000   3,486,000 3,199,000
Segment operating income/(loss) 673,000   313,000   828,000 936,000
Other items to reconcile segment operating income (loss) to net income/(loss):            
Other income / (expense) 63,000   27,000   119,000 64,000
Income tax expense (204,000)   (118,000)   (294,000) (281,000)
Net income/(loss) 532,000 $ 121,000 222,000 $ 497,000 653,000 719,000
Service [Member]            
Revenues:            
Total revenues 4,779,000   3,964,000   8,585,000 7,748,000
Costs of revenues:            
Total costs of revenues 2,736,000   2,325,000   4,932,000 4,361,000
Product [Member]            
Revenues:            
Total revenues 938,000   878,000   1,909,000 1,885,000
Costs of revenues:            
Total costs of revenues 555,000   522,000   1,123,000 1,059,000
Consulting Revenue [Member]            
Revenues:            
Total revenues 409,000   489,000   899,000 1,854,000
Costs of revenues:            
Total costs of revenues 329,000   354,000   689,000 1,540,000
Verification and Certification Segment [Member]            
Assets:            
Goodwill 1,947,000   1,947,000   1,947,000 1,947,000
All other assets, net 6,249,000   14,244,000   6,249,000 14,244,000
Total assets 8,196,000   16,191,000   8,196,000 16,191,000
Revenues:            
Total revenues 5,717,000   4,842,000   10,494,000 9,633,000
Costs of revenues:            
Total costs of revenues 3,291,000   2,847,000   6,055,000 5,420,000
Gross profit 2,426,000   1,995,000   4,439,000 4,213,000
Depreciation & amortization 120,000   149,000   251,000 294,000
Other operating expenses 1,599,000   1,561,000   3,343,000 3,074,000
Segment operating income/(loss) 707,000   285,000   845,000 845,000
Other items to reconcile segment operating income (loss) to net income/(loss):            
Other income / (expense) 65,000   50,000   122,000 100,000
Income tax expense    
Net income/(loss) 772,000   335,000   967,000 945,000
Verification and Certification Segment [Member] | Service [Member]            
Revenues:            
Total revenues 4,779,000   3,964,000   8,585,000 7,748,000
Costs of revenues:            
Total costs of revenues 2,736,000   2,325,000   4,932,000 4,361,000
Verification and Certification Segment [Member] | Product [Member]            
Revenues:            
Total revenues 938,000   878,000   1,909,000 1,885,000
Costs of revenues:            
Total costs of revenues 555,000   522,000   1,123,000 1,059,000
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 2,660,000   3,865,000   2,660,000 3,865,000
Total assets 3,659,000   4,864,000   3,659,000 4,864,000
Revenues:            
Total revenues 409,000   489,000   899,000 1,854,000
Costs of revenues:            
Total costs of revenues 329,000   354,000   689,000 1,540,000
Gross profit 80,000   135,000   210,000 314,000
Depreciation & amortization 43,000   48,000   84,000 98,000
Other operating expenses 71,000   59,000   143,000 125,000
Segment operating income/(loss) (34,000)   28,000   (17,000) 91,000
Other items to reconcile segment operating income (loss) to net income/(loss):            
Other income / (expense) (2,000)   (23,000)   (3,000) (36,000)
Income tax expense    
Net income/(loss) (36,000)   5,000   (20,000) 55,000
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 409,000   489,000   899,000 1,854,000
Costs of revenues:            
Total costs of revenues 329,000   354,000   689,000 1,540,000
Eliminations and Other [Member]            
Assets:            
Goodwill    
All other assets, net 5,819,000   (143,000)   5,819,000 (143,000)
Total assets 5,819,000   (143,000)   5,819,000 (143,000)
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 (204,000)   (118,000)   (294,000) (281,000)
Net income/(loss) (204,000)   (118,000)   (294,000) (281,000)
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