XML 72 R57.htm IDEA: XBRL DOCUMENT v3.20.4
Note 4 - Assets Held for Sale (Details Textual) - Transition of Production from the Broadway Plant [Member] - USD ($)
12 Months Ended
Apr. 13, 2020
Dec. 31, 2020
Proceeds from Sale of Real Estate, Total $ 1,700,000  
Proceeds from Sale of Other Property, Plant, and Equipment   $ 268,000