Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

v3.3.1.900
Income Taxes (Narrative) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2005
Income Taxes [Line Items]          
Uncertain tax benefit positions that would reduce the effective income tax rate if recognized $ 220,000 $ 220,000      
Dividend-received deduction   85.00%      
Valuation allowance 3,700,000 $ 5,668,000      
Accrual for interest and penalties 4,000 4,000      
Net increase (decrease) in accrued interest and penalties   (2,000)      
Dividends declared not paid 1,474,892 1,474,892 $ 1,446,498 $ 1,436,318  
Domestic Tax Authority [Member]          
Income Taxes [Line Items]          
Net operating loss carryforwards 3,647,000 3,647,000      
Income tax benefit related to research and development credits   1,554,000      
Tax credit carryforward related to research and development 496,000 496,000      
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 594,000 594,000      
Austin Taylor Communications, Ltd. [Member]          
Income Taxes [Line Items]          
Pretax income (losses)   1,742,000 389,000 428,000  
Net operating loss carryforwards 8,077,000 8,077,000      
Transition Networks EMEA, Ltd. [Member]          
Income Taxes [Line Items]          
Pretax income (losses)   (558,000) (54,000) 2,754,000  
Net operating loss carryforwards 0 0      
Transition Networks China [Member]          
Income Taxes [Line Items]          
Pretax income (losses)   29,000 345,000 341,000  
Net operating loss carryforwards 374,000 374,000      
Suttle Costa Rica, S.A. [Member]          
Income Taxes [Line Items]          
Pretax income (losses)   446,000 $ 321,000 $ 152,000  
Net operating loss carryforwards $ 0 $ 0      
Dividends declared not paid         $ 3,500,000