Quarterly report pursuant to Section 13 or 15(d)

Goodwill and intangible assets - Additional information (Details)

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Goodwill and intangible assets - Additional information (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]          
Goodwill $ 18,614,000   $ 18,614,000   $ 18,614,000
Goodwill, accumulated impairment loss 0   0   0
Goodwill, impairment expense     0   $ 0
Amortization expense $ 400,000 $ 800,000 $ 400,000 $ 800,000  
Weighted Average          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful lives of intangible assets     9 years 1 month 6 days