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Note 11 - Subsequent Event (Details Textual) - USD ($)
3 Months Ended
Apr. 01, 2017
Dec. 31, 2016
Oct. 01, 2016
Cash Surrender Value of Life Insurance   $ 2,771,433 $ 2,697,465
Founder and Former Chief Executive Office and His Ex Wife [Member]      
Deferred Compensation Arrangement, Annual Payment   113,561  
Mr. Spann [Member]      
Life Insurance, Corporate or Bank Owned, Amount   3,300,000  
Mr. Spann [Member] | Scenario, Forecast [Member]      
Proceeds from Life Insurance Policies $ 3,300,000    
Mr. Spann [Member] | Scenario, Forecast [Member] | Nonoperating Income (Expense) [Member]      
Gain (Loss) on Life Insurance Policies $ 700,000    
Mr. Spann [Member] | Other Assets [Member]      
Cash Surrender Value of Life Insurance   2,600,000  
Ms. Spann [Member] | Accrued and Sundry Liabilties and Deferred Compensation [Member]      
Deferred Compensation Arrangement with Individual, Recorded Liability   $ 380,000