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Contract Assets (Details) - USD ($)
 3 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Mar. 31, 2023
Contract Assets [Abstract]      
Long-term contract assets, write-down $ 778,000 $ 572,000  
Short-term contract assets [Abstract]      
Cores expected to be returned by customers 15,915,000   $ 13,463,000
Core premiums paid to customers 9,775,000   9,812,000
Upfront payments to customers 1,458,000   1,593,000
Finished goods premiums paid to customers 584,000   575,000
Total short-term contract assets 27,732,000   25,443,000
Long-term contract assets [Abstract]      
Remanufactured cores held at customers' locations 268,906,000   271,628,000
Core premiums paid to customers 36,401,000   38,310,000
Long-term core inventory deposits 5,569,000   5,569,000
Finished goods premiums paid to customers 2,651,000   2,530,000
Upfront payments to customers 936,000   344,000
Total long-term contract assets $ 314,463,000   $ 318,381,000