Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

v3.20.1
Income Taxes (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Line Items]        
Uncertain tax benefit positions that would reduce the effective income tax rate if recognized   $ 101,000    
Uncertain tax positions   $ 101,000 $ 60,000 $ 41,000
Cumulative loss, period used to evaluate negative objective evidence   3 years    
Valuation allowance   $ 8,170,000    
Expiration of statute of limitations     9,000  
Accrual for interest and penalties   0    
Net increase (decrease) in accrued interest and penalties   0    
Scenario, Forecast [Member]        
Income Taxes [Line Items]        
Expiration of statute of limitations $ 1,000      
Domestic Tax Authority [Member]        
Income Taxes [Line Items]        
Net operating loss carryforwards   7,687,000 $ 1,930,000  
Income tax benefit related to research and development credits   1,554,000    
Tax credit carryforward related to research and development   $ 467,000    
Operating loss carryforward expiration date   Dec. 31, 2035 Dec. 31, 2023  
State and Local Jurisdiction [Member]        
Income Taxes [Line Items]        
Income tax benefit related to research and development credits   $ 1,024,000    
Tax credit carryforward related to research and development   594,000    
Austin Taylor Communications, Ltd. [Member]        
Income Taxes [Line Items]        
Pretax income (losses)   0 $ 0  
Net operating loss carryforwards   7,462,000    
Net2Edge [Member]        
Income Taxes [Line Items]        
Pretax income (losses)   (1,519,000) (2,772,000)  
Net operating loss carryforwards   8,745,000    
Transition Networks China [Member]        
Income Taxes [Line Items]        
Pretax income (losses)   0 0  
Net operating loss carryforwards   29,000    
Suttle Costa Rica, S.A. [Member]        
Income Taxes [Line Items]        
Pretax income (losses)     $ 45,000  
Net operating loss carryforwards   $ 0