CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Revenues		$ 87,500	$ 92,792	$ 175,646	$ 184,246
Cost of revenues	[1]	17,122	17,246	34,170	34,754
Gross profit		70,378	75,546	141,476	149,492
Operating expenses:
Sales and marketing	[1]	11,718	17,507	24,276	34,400
Research, development and engineering	[1]	1,643	1,765	3,548	3,669
General and administrative	[1]	17,136	17,432	36,104	38,584
Total operating expenses		30,497	36,704	63,928	76,653
Income from operations		39,881	38,842	77,548	72,839
Interest expense		(8,657)	(12,817)	(14,856)	(25,383)
Interest income		593	661	1,516	665
Other income (expense), net		663	568	4,565	(280)
Income before income taxes		32,480	27,254	68,773	47,841
Income tax expense		8,606	6,196	18,529	11,325
Net income		$ 23,874	$ 21,058	$ 50,244	$ 36,516
Net income per common share:
Basic (in dollars per share)		$ 1.24	$ 1.07	$ 2.61	$ 1.85
Diluted (in dollars per share)		$ 1.24	$ 1.07	$ 2.61	$ 1.85
Weighted average shares outstanding:
Basic (in shares)		19,249,116	19,654,922	19,234,728	19,750,570
Diluted (in shares)		19,287,479	19,662,201	19,260,608	19,772,898

[1] (1) Includes share-based compensation expense as follows: Cost of revenues$481 $334 $984 $630 Sales and marketing585 387 1,264 759 Research, development and engineering70 52 165 92 General and administrative2,602 3,890 5,775 8,322 Total$3,738 $4,663 $8,188 $9,803