Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid In Capital	Accumulated Other Comprehensive Loss	Accumulated Earnings	Non-controlling Interest in LLC
Beginning balance (in shares) at Jun. 30, 2021				20,847,000	10
Beginning balance at Jun. 30, 2021	$ 381,154			$ 207	$ 0	$ 111,308	$ (1,639)	$ 263,552	$ 7,726
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27,933							26,944	989
Stock based compensation, net of withholding taxes on vested equity awards (in shares)				7,000
Stock based compensation, net of withholding taxes on vested equity awards	728					728
Issuances of equity for services	58					58
Distributions to LLC Unit holders	(558)								(558)
Foreign currency translation adjustment	(859)						(835)		(24)
Ending balance (in shares) at Sep. 30, 2021				20,840,000	10
Ending balance at Sep. 30, 2021	408,456			$ 207	$ 0	112,094	(2,474)	290,496	8,133
Beginning balance (in shares) at Jun. 30, 2021				20,847,000	10
Beginning balance at Jun. 30, 2021	381,154			$ 207	$ 0	111,308	(1,639)	263,552	7,726
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	113,745
Ending balance (in shares) at Mar. 31, 2022				20,503,000	10
Ending balance at Mar. 31, 2022	467,139			$ 203	$ 0	85,568	(1,625)	373,265	9,728
Beginning balance (in shares) at Sep. 30, 2021				20,840,000	10
Beginning balance at Sep. 30, 2021	408,456			$ 207	$ 0	112,094	(2,474)	290,496	8,133
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	30,979							29,891	1,088
Stock based compensation, net of withholding taxes on vested equity awards (in shares)				101,000
Stock based compensation, net of withholding taxes on vested equity awards	54			$ 1		53
Issuance of equity for services (in shares)				1,000
Issuances of equity for services	948					948
Issuances of equity for exercise of stock options (in shares)				35,000
Issuances of equity for exercise of stock options	971					971
Repurchase and retirement of common stock (in shares)				(78,000)
Repurchase and retirement of common stock	(5,228)			$ (1)		(5,227)
Distributions to LLC Unit holders	(452)								(452)
Foreign currency translation adjustment	142						138		4
Ending balance (in shares) at Dec. 31, 2021				20,899,000	10
Ending balance at Dec. 31, 2021	435,870			$ 207	$ 0	108,839	(2,336)	320,387	8,773
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	54,833							52,878	1,955
Stock based compensation, net of withholding taxes on vested equity awards (in shares)				1,000
Stock based compensation, net of withholding taxes on vested equity awards	1,639					1,639
Issuances of equity for services	68					68
Repurchase and retirement of common stock (in shares)				(397,000)
Repurchase and retirement of common stock	(24,982)			$ (4)		(24,978)
Distributions to LLC Unit holders	(1,021)								(1,021)
Foreign currency translation adjustment	732						711		21
Ending balance (in shares) at Mar. 31, 2022				20,503,000	10
Ending balance at Mar. 31, 2022	467,139			$ 203	$ 0	85,568	(1,625)	373,265	9,728
Beginning balance (in shares) at Jun. 30, 2022		20,501,081	10	20,501,000	10
Beginning balance at Jun. 30, 2022	513,568			$ 203	$ 0	85,294	(3,507)	421,184	10,394
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	36,105							34,883	1,222
Stock based compensation, net of withholding taxes on vested equity awards (in shares)				12,000
Stock based compensation, net of withholding taxes on vested equity awards	743					743
Issuances of equity for services	67					67
Repurchase and retirement of common stock (in shares)				(144,000)
Repurchase and retirement of common stock	(7,868)			$ (1)		(7,867)
Distributions to LLC Unit holders	(696)								(696)
Foreign currency translation adjustment	(1,479)						(1,436)		(43)
Ending balance (in shares) at Sep. 30, 2022				20,345,000	10
Ending balance at Sep. 30, 2022	540,440			$ 202	$ 0	78,237	(4,943)	456,067	10,877
Beginning balance (in shares) at Jun. 30, 2022		20,501,081	10	20,501,000	10
Beginning balance at Jun. 30, 2022	513,568			$ 203	$ 0	85,294	(3,507)	421,184	10,394
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 125,953
Issuances of equity for exercise of stock options (in shares)	3,125
Ending balance (in shares) at Mar. 31, 2023		20,624,712	12	20,624,000	12
Ending balance at Mar. 31, 2023	$ 633,271			$ 204	$ 0	84,802	(4,127)	543,117	9,275
Beginning balance (in shares) at Sep. 30, 2022				20,345,000	10
Beginning balance at Sep. 30, 2022	540,440			$ 202	$ 0	78,237	(4,943)	456,067	10,877
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	36,396							35,162	1,234
Stock based compensation, net of withholding taxes on vested equity awards (in shares)				128,000
Stock based compensation, net of withholding taxes on vested equity awards	23			$ 1		22
Issuance of equity for services (in shares)				2,000
Issuances of equity for services	948					948
Distributions to LLC Unit holders	(688)								(688)
Foreign currency translation adjustment	1,263						1,227		36
Ending balance (in shares) at Dec. 31, 2022				20,475,000	10
Ending balance at Dec. 31, 2022	578,382			$ 203	$ 0	79,207	(3,716)	491,229	11,459
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	53,452							51,888	1,564
Stock based compensation, net of withholding taxes on vested equity awards (in shares)				1,000
Stock based compensation, net of withholding taxes on vested equity awards	1,707					1,707
Issuances of equity for services	68					68
Issuances of equity for exercise of stock options (in shares)				3,000
Issuances of equity for exercise of stock options	132					132
Increase in payable pursuant to the tax receivable agreement	(1,717)					(1,717)
Increase in deferred tax asset from step-up in tax basis	2,640					2,640
Exchange of LLC Units for Class A Common Stock (in shares)				145,000	0
Exchange of LLC Units for Class A Common Stock	1			$ 1		2,765			(2,765)
Issuances of Class B Common Stock (in shares)					2
Distributions to LLC Unit holders	(971)								(971)
Foreign currency translation adjustment	(423)						(411)		(12)
Ending balance (in shares) at Mar. 31, 2023		20,624,712	12	20,624,000	12
Ending balance at Mar. 31, 2023	$ 633,271			$ 204	$ 0	$ 84,802	$ (4,127)	$ 543,117	$ 9,275