Note 11  Stockbased Compensation  Weighted Average Assumptions (Details)  $ / shares 
9 Months Ended  

Sep. 30, 2022 
Sep. 30, 2021 

Riskfree interest rate  2.17%  0.52% 
Expected dividend yield  0.00%  0.00% 
Expected volatility  82.70%  81.80% 
Expected life of options (Year)  5 years  5 years 
Grant date fair value (in dollars per share)  $ 0.79  $ 2.59 
X  
 Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/disclosureRef

X  
 Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probabilityweighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef

X  
 Definition The riskfree interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef

X  
 Definition The weighted average grantdate fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/disclosureRef

X  
 Definition Expected term of award under sharebased payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
