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Note 16 - Related Party Transactions (Details Textual)
12 Months Ended
Dec. 27, 2019
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
ft²
shares
Dec. 31, 2018
USD ($)
shares
Nov. 26, 2014
USD ($)
Jun. 30, 2007
ft²
Related Party Transaction, Percent of Common Stock Purchase to Trigger Share Sale   50.00%      
Debt Satisfied By Issuance of Series A Preferred Stock [Member]          
Debt Conversion, Original Debt, Amount $ 40,000,000        
Series A Preferred Stock [Member]          
Temporary Equity, Shares Issued | shares 400,000 400,000 0    
Temporary Equity, Liquidation Preference $ 40,000,000        
Preferred Stock, Dividend Rate, Percentage 6.00%        
Temporary Equity, Redemption Price Per Share | $ / shares $ 100        
Temporary Equity, Conversion Price Per Share | $ / shares $ 10        
Chief Executive Officer [Member]          
Area of Real Estate Property | ft²   600     1,000
Related Party Transaction, Other Revenues from Transactions with Related Party   $ 16,627 $ 18,089    
Related Party Transaction, Due from (to) Related Party, Noncurrent, Total   41,527      
Related Party Transaction, Amounts of Transaction   $ 269,072 $ 270,932    
Dove Ventures, LLC [Member] | Senior Secured Term Loan Facility [Member]          
Line of Credit Facility, Maximum Borrowing Capacity       $ 40,000,000