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Subsequent Events (Detail) - Subsequent Event [Member]
Jul. 30, 2021
Jul. 09, 2021
May 19, 2021
EUR (€)
€ / shares
May 19, 2021
USD ($)
$ / shares
Subsequent Event [Line Items]        
Dividends Payable, Date Declared     May 19, 2021  
Dividend declared (USD per share) | $ / shares       $ 0.22
Dividends Payable, Date to be Paid Jul. 30, 2021      
Dividends Payable, Date of Record   Jul. 09, 2021    
Percentage of Outstanding Shares Validly Tendered     9290.00% 9290.00%
Tender Offer Price | € / shares     € 3.30  
Total Equity Purchase Price     € 8,100,000 $ 9,900,000
Assumption of Debt Amount | $       $ 3,000,000