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Goodwill and Intangible Assets - Identifiable intangible assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Original Cost $ 58,523 $ 58,523
Accumulated Amortization (36,513) (32,850)
Net Book Value 22,010 25,673
Developed technology    
Original Cost 32,620 32,620
Accumulated Amortization (20,301) (17,709)
Net Book Value 12,319 14,911
Trade names and trademarks    
Original Cost 2,080 2,080
Accumulated Amortization (1,340) (1,183)
Net Book Value 740 897
Customer relationships    
Original Cost 10,690 10,690
Accumulated Amortization (2,183) (1,381)
Net Book Value 8,507 9,309
Independent sales agency network    
Original Cost 4,500 4,500
Accumulated Amortization (4,500) (4,500)
Patent    
Original Cost 7,623 7,623
Accumulated Amortization (7,623) (7,623)
Non-compete agreements    
Original Cost 1,010 1,010
Accumulated Amortization (566) (454)
Net Book Value $ 444 $ 556