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Summary of Significant Accounting Policies (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Accounting Policies [Line Items]    
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 3,451 $ (20,569)
Foreign Currency Transaction Gain (Loss), Realized (181) 8,667
Other Nonoperating Gains (Losses) 183 410
Other income (expense), net 3,453 (11,492)
Realized gain (loss) on derivatives not designated as hedging instruments $ (2,692) $ (2,232)
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 60  
Weighted average shares outstanding — diluted 25,051,742 25,167,845
Weighted-average shares issuable upon exercise/vesting of outstanding share options/PSUs/RSUs/warrants (1)(2) 477,287 0
Stock Repurchased and Retired During Period, Shares 45,000  
Purchase of ordinary shares $ 2,726 $ 10,620
Net Income (Loss) Per Share Attributable to Cimpress plc [Line Items]    
Weighted average shares outstanding — basic 24,574,455 25,167,845
Weighted-average shares issuable upon exercise/vesting of outstanding share options/PSUs/RSUs/warrants (1)(2) 477,287 0
Weighted average shares outstanding — diluted 25,051,742 25,167,845
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1,955,243 1,224,628
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 1,055,377  
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants   341,158
Realized gain (loss) on derivatives not designated as hedging instruments $ (2,692) $ (2,232)
Foreign Exchange Forward [Member]    
Accounting Policies [Line Items]    
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net $ 3,451 $ (20,569)