XML 68 R56.htm IDEA: XBRL DOCUMENT v3.23.1
Stock incentive plans, Stock incentive plans (Details)
12 Months Ended
Dec. 31, 2022
Plan
shares
Stock incentive plans [Abstract]  
Number of stock incentive plans | Plan 2
Stock Options [Member]  
Stock incentive plans [Abstract]  
Exercise price as a percentage of fair market value of common stock at date of grant 100.00%
Term of award 10 years
Stock Options [Member] | Minimum [Member]  
Stock incentive plans [Abstract]  
Vesting period 2 years
Stock Options [Member] | Maximum [Member]  
Stock incentive plans [Abstract]  
Vesting period 4 years
2014 Equity Incentive Plan [Member]  
Stock incentive plans [Abstract]  
Number of shares authorized (in shares) 2,200,000
Number of shares available for grant (in shares) 347,652
2014 Equity Incentive Plan [Member] | Stock Options [Member]  
Stock incentive plans [Abstract]  
Term of award 10 years