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Note 6 - Exit and Disposal Activities (Details Textual) - Transition of Production from the Broadway Plant [Member] - USD ($)
6 Months Ended
Apr. 13, 2020
Jul. 05, 2020
Jun. 30, 2019
Proceeds from Sale of Real Estate, Total $ 1,700,000    
Gain (Loss) on Disposition of Property Plant Equipment, Total $ 807,000    
Restructuring and Related Costs, Incurred Cost, Total   $ 124,000 $ 201,000
Restructuring and Related Cost, Incurred Cost, Per Share (in dollars per share)   $ 0.01 $ 0.01