Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

v3.21.1
Income Taxes (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Taxes [Line Items]      
Uncertain tax benefit positions that would reduce the effective income tax rate if recognized   $ 115,000  
Cumulative loss, period used to evaluate negative objective evidence   3 years  
Valuation allowance   $ 8,728,000  
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 $ 0    
Domestic Tax Authority [Member]      
Income Taxes [Line Items]      
Net operating loss carryforwards   10,940,000  
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  
Capital loss carryforward   $ 1,930,000  
Capital loss carryforward, expiration   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)   (955,000) (1,519,000)
Net operating loss carryforwards   9,700,000  
Transition Networks China [Member]      
Income Taxes [Line Items]      
Pretax income (losses)   0 $ 0
Net operating loss carryforwards   0  
Suttle Costa Rica, S.A. [Member]      
Income Taxes [Line Items]      
Net operating loss carryforwards   $ 0