Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 572,221	$ 532,179	$ 469,921
Term Licenses and Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	320,181	283,226	224,472
Perpetual Licenses [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	43,339	41,582	35,493
Maintenance [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	135,752	122,733	117,159
Professional Software Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	7,236	6,205	14,587
Software Related Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	30,661	31,823	26,454
Client Engineering Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	28,883	39,282	44,320
Other [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 6,169	$ 7,328	$ 7,436