Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations (Narrative) (Details)

v3.20.1
Discontinued Operations (Narrative) (Details)
 3 Months Ended 12 Months Ended
Mar. 11, 2020
USD ($)
item
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Proceeds from sale   $ 8,308,000  
Gain on sale of business line   2,161,000  
Number of buildings leased to purchaser | item 2    
Restructuring expense   320,000  
Restructuring payments   0  
Restructuring accrual   $ 320,000  
Scenario, Forecast [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Restructuring expense     $ 1,200,000
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    
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    
Suttle [Member] | Maximum [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Continuation of product manufacturing, period 6 months