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Note 1 - Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Share-based Payment Arrangement, Option, Activity [Table Text Block]
   
Shares
   
Weighted-
Average
Exercise
Price Per
Share
   
Weighted-
Average
Remaining
Contractual
Term
(in years)
   
Aggregate
Intrinsic Value
(in thousands)
 
Outstanding - January 1, 2020
   
372,200
    $
3.85
     
 
     
 
 
Granted
   
11,300
     
2.95
     
 
     
 
 
Exercised
   
-
     
 
     
 
     
 
 
Cancelled
   
(16,667
)    
3.65
     
 
     
 
 
Outstanding - September 30, 2020
   
366,833
    $
3.83
     
7.88
    $
317
 
Exercisable - September 30, 2020
   
181,640
    $
3.72
     
7.44
    $
176
 
Schedule of Inventory, Current [Table Text Block]
   
September 30,
   
December 31,
 
   
2020
   
2019
 
Raw Materials
  $
15,314
    $
15,245
 
Work in Process
   
607
     
479
 
Finished Goods
   
459
     
41
 
Reserves
   
(1,884
)    
(1,486
)
                 
Total
  $
14,496
    $
14,279
 
Schedule of Finite-Lived Intangible Assets [Table Text Block]
           
September 30, 2020
 
           
Gross
                 
           
Carrying
   
Accumulated
   
Net Book
 
   
Years
   
Amount
   
Amortization
   
Value
 
Customer Relationships
   
9
    $
1,302
    $
759
    $
543
 
Intellectual Property
   
3
     
100
     
100
     
-
 
Trade Names
   
20
     
814
     
214
     
600
 
Patents
   
7
     
67
     
-
     
67
 
Totals
   
 
    $
2,283
    $
1,073
    $
1,210
 
           
December 31, 2019
 
           
Gross
                 
           
Carrying
   
Accumulated
   
Net Book
 
   
Years
   
Amount
   
Amortization
   
Value
 
Customer Relationships
   
9
    $
1,302
    $
651
    $
651
 
Intellectual Property
   
3
     
100
     
95
     
5
 
Trade Names
   
20
     
814
     
183
     
631
 
Patents
   
7
     
56
     
-
     
56
 
Totals
   
 
    $
2,272
    $
929
    $
1,343
 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Year
 
Amount
 
Remainder of 2020
  $
46
 
2021
   
186
 
2022
   
185
 
2023
   
185
 
2024
   
113
 
Thereafter
   
428
 
Total
  $
1,143