Note 7  Stockbased Compensation  Assumptions (Details) 
3 Months Ended  

Mar. 31, 2022 
Mar. 31, 2021 

Dividend yield  0.00%  0.00% 
Expected term (Year)  5 years  
Minimum [Member]  
Riskfree interest rate  1.91%  0.46% 
Expected term (Year)  5 years 9 months  
Expected volatility  45.80%  92.60% 
Maximum [Member]  
Riskfree interest rate  2.41%  0.92% 
Expected term (Year)  6 years  
Expected volatility  46.10%  93.80% 
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 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

X  
 Details

X  
 Details
