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Note 30 - Supplemental Cash Flow Disclosure (Details Textual) - USD ($)
 12 Months Ended
Dec. 30, 2019
Jan. 01, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aug. 22, 2020
Dec. 31, 2017
Interest Paid, Excluding Capitalized Interest, Operating Activities     $ 8,711,000 $ 7,265,000 $ 7,145,000    
Income Taxes Paid     234,000 30,000 44,000    
Proceeds from Income Tax Refunds     82,000 48,000 8,000    
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary     (23,000)    
Increase (decrease) other investments $ 7,779,000   (9,694,000)        
Operating Lease, Right-of-Use Asset     6,063,000 7,155,000      
Operating Lease, Liability, Total     6,531,000 7,693,000      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance     101,437,000 48,756,000 42,438,000   $ 48,156,000
Increase (Decrease) in Other Receivables     $ (42,696,000) $ 34,535,000 8,559,000    
Preferred Stock, Shares Issued, Total (in shares)     27,413,098 27,413,098      
ViaNova Investment [Member]              
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary         750,000    
Redeemable Financial Instruments Accounts Receivable       $ 250,000 250,000    
Series F Preferred Stock [Member]              
Preferred Stock, Shares Issued, Total (in shares) 22,429,541            
Accounting Standards Update 2016-02 [Member]              
Operating Lease, Right-of-Use Asset   $ 8,416,000          
Operating Lease, Liability, Total   8,860,000          
Increase (Decrease) in Other Receivables   18,000          
Increase (Decrease) in Other Operating Liabilities, Total   (406,000)          
Accounting Standards Update 2016-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]              
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance   $ 20,000     (20,000)    
Discontinued Operations, Disposed of by Sale [Member] | ViaNova [Member]              
Disposal Group, Transferred On RTL, Fair Value           $ 2,243,000  
Additional Paid-in Capital [Member]              
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary     $ (1,765,000) 28,000 (217,000)    
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance     65,031,000 68,714,000 68,591,000   69,202,000
Additional Paid-in Capital [Member] | Accounting Standards Update 2016-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]              
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance            
AOCI Attributable to Parent [Member]              
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary     59,000 (4,000) 22,000    
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance     (821,000) (915,000) (908,000)   (850,000)
AOCI Attributable to Parent [Member] | Accounting Standards Update 2016-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]              
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance            
Noncontrolling Interest [Member]              
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary     1,706,000 (47,000) 195,000    
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance     $ 57,528,000 $ 15,437,000 6,664,000   $ 8,284,000
Noncontrolling Interest [Member] | Accounting Standards Update 2016-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]              
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance