Annual report pursuant to Section 13 and 15(d)

Discontinued Operations (Narrative) (Details)

v3.21.1
Discontinued Operations (Narrative) (Details)
3 Months Ended 12 Months Ended
Mar. 11, 2020
USD ($)
item
Apr. 05, 2019
USD ($)
Mar. 31, 2020
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Restricted cash           $ 679,006
Number of buildings leased to purchaser | item 2          
Restructuring expense         $ 960,000  
Restructuring charges including remaining shut down costs         1,000,000  
Restructuring payments         708,000  
Restructuring accrual         252,000  
Discontinued Operations, Disposed of by Sale [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Proceeds from sale         8,900,000  
Gain on sale of business line         $ 2,247,000  
Suttle FutureLink Fiber Business Line [Member] | Discontinued Operations, Disposed of by Sale [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Proceeds from sale   $ 5,000,000        
Restricted cash   $ 500,000        
Gain on sale of business line       $ 2,967,000    
Remainder of Suttle Business Lines [Member] | Discontinued Operations, Disposed of by Sale [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Proceeds from sale $ 8,000,000          
Working capital adjustment, period after close 90 days          
Gain on sale of business line     $ 2,161,000      
Minimum [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Base rents $ 6,970          
Maximum [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Base rents $ 7,180