| Schedule of Discontinued Operations Assets and Liabilities Classified as Held-for-Sale | 
 
		
			
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						March 31, 2020 
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						December 31, 2019 
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						  Trade accounts receivable 
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						$ 
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						  - 
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						$ 
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				2,235,000 
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						  Inventories  
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						  - 
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				3,009,000 
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						  Other current assets 
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						  - 
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				93,000 
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						Total current assets 
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						$ 
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						  - 
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						$ 
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				5,337,000 
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						Property, plant, and equipment 
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						$ 
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						  - 
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						$ 
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				883,000 
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						Total noncurrent assets 
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						$ 
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						  - 
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						$ 
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				883,000 
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						Total assets held for sale 
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						$ 
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						  - 
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						$ 
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				6,220,000 
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						Accounts payable 
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						$ 
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						  - 
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						$ 
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				1,111,000 
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						Other accrued liabilities 
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						  - 
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				82,000 
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						Total liabilities held for sale 
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						$ 
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						  - 
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						$ 
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				1,193,000 
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| Schedule of Financial Results of Discontinued Operations | 
 
		
			
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						Three Months Ended March 31 
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				2020 
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				2019 
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						Sales 
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						$ 
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				3,025,000 
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						$ 
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				5,507,000 
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						Cost of sales 
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				2,050,000 
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				3,706,000 
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						Selling, general and administrative expenses 
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				500,000 
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				799,000 
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						Restructuring expenses 
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				320,000 
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						  - 
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						Gain on sale of assets 
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				(2,161,000)
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				(9,000)
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						Operating income before income taxes 
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				2,316,000 
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				1,011,000 
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						Income tax expense (benefit) 
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				3,000 
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				(21,000)
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						Income from discontinued operations 
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						$ 
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				2,313,000 
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						$ 
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				1,032,000 
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