Quarterly report pursuant to Section 13 or 15(d)

Stockholders Equity (Equity Incentive Plans) (Narrative) (Details)

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Stockholders Equity (Equity Incentive Plans) (Narrative) (Details) - shares
1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2018
Mar. 31, 2022
Dec. 31, 2016
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares authorized         400,000
Additional shares authorized 600,000        
Shares available for grant 1,000,000        
Predetermined offering period, lower fair market value percentage     85.00%    
Number of shares purchased under ESPP     412,458    
Shares available for future sale     587,542    
Options [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares authorized   5,000,000   2,000,000  
Expiration period       10 years  
Additional shares authorized 3,000,000 3,000,000      
Shares available for grant 8,000,000 5,000,000      
Shares available for future sale     2,955,524