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Note 8 - Fair Value
12 Months Ended
Dec. 31, 2019
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
NOTE
8
: FAIR VALUE 
 
The carrying amounts of our cash and cash equivalents, restricted cash, research and development tax rebate receivable, accounts payable, and accrued expenses approximate their fair values due to their short-term maturities at
December 
31,
2019
and
2018.