Consolidated Statements of Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Revenue	$ 523,118	$ 492,851	$ 443,388
Cost of services (exclusive of depreciation and amortization presented separately below)	374,992	373,973	335,249
Selling, general and administrative	88,663	80,153	76,976
Depreciation and amortization	18,985	18,100	14,118
Total operating expenses	482,640	472,226	426,343
Income from operations	40,478	20,625	17,045
Interest expense, net	(152)	(1,246)	(1,892)
Income before income taxes	40,326	19,379	15,153
Provision for income tax (expense) / benefit	(8,744)	2,077	(2,064)
Net income	31,582	21,456	13,089
Other comprehensive loss
Foreign currency translation adjustments	(2,234)	(2,281)	(650)
Unrealized gain / (loss) on cash flow hedging instruments, net of tax	515	(323)	202
Actuarial (loss) / gain on defined benefit plan	(31)	440	137
Total other comprehensive loss	(1,750)	(2,164)	(311)
Total comprehensive income	$ 29,832	$ 19,292	$ 12,778
Net income per share
Basic (in dollars per share)	$ 1.74	$ 1.18	$ 0.74
Diluted (in dollars per share)	$ 1.67	$ 1.15	$ 0.71
Weighted average common shares outstanding
Basic (in shares)	18,200	18,232	17,649
Diluted (in shares)	18,893	18,724	18,359