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Leases (Details) - USD ($)
12 Months Ended
Dec. 23, 2019
Jun. 21, 2016
Feb. 01, 2016
Dec. 31, 2019
Dec. 31, 2018
Leases (Details) [Line Items]          
Operating Leases, Rent Expense       $ 608,000 $ 662,000
Operating Lease, Expense       497,000  
Short-term Lease Payments       $ 111,000  
Minimum [Member]          
Leases (Details) [Line Items]          
Lessee, Operating Lease, Renewal Term       1 year  
Maximum [Member]          
Leases (Details) [Line Items]          
Lessee, Operating Lease, Renewal Term       5 years  
Manufacturing Facility in Hazelwood, Missouri [Member]          
Leases (Details) [Line Items]          
Operating Leases, Rent Expense, Net   $ 317,000      
Lease Expiration Period   7 years      
Office Space in Urbandale, Iowa [Member]          
Leases (Details) [Line Items]          
Operating Leases, Rent Expense, Net $ 28,000        
Lease Expiration Period 2 years        
Des Moines, Iowa Facility [Member]          
Leases (Details) [Line Items]          
Operating Leases, Rent Expense, Net     $ 158,000    
Lease Expiration Period     2 years