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Note 15 - Commitments (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Lessee, Operating Lease, Disclosure [Table Text Block]
Lease period
 
Amount per month
 
March 1, 2017
February 28, 2018
  $
38,000
 
March 1, 2018
February 28, 2019
  $
40,000
 
March 1, 2019
February 29, 2020
  $
42,000
 
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
    Total
201
8
 
1,443,000
2019
 
1,427,000
2020  
947,000
2021  
805,000
2022+  
201,000
Total
$
4,823,000
Schedule of Minimum Guaranteed Benefit Liabilities [Table Text Block]
2018
   
500,000
 
2019
   
500,000
 
Total
  $
1,000,000