XML 32 R22.htm IDEA: XBRL DOCUMENT v3.19.1
Note 4 - Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
Level 2   March 31,
2019
  March 31,
2018
(Liabilities) Assets:                
Derivative financial instruments   $
(175
)   $
50