CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 53,146	$ (9,406)	$ (20,608)	$ (20,317)
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization	119,930	95,222	125,642	28,595
Reduction in the carrying amount of right-of-use assets	5,915	3,803	5,515	3,188
Foreign Currency Transaction Gain (Loss), before Tax	(306)	3,987
Net foreign currency (gains) losses	(300)		5,525	4,932
Stock-based compensation	15,763	1,377	1,744	606
Deferred tax liability	(79,021)	(51,394)	(57,086)	(3,201)
Provision for bad debts	794	(204)	(145)	115
Other non-cash operating activities	228	(104)	165	71
Changes in assets and liabilities:
Accounts receivable	11,204	(10,214)	(5,476)	3,910
Increase (Decrease) in Other Current Assets	0	314
Contract assets	(78,122)	13,092	(17,868)	(2,193)
Increase (Decrease) in Other Noncurrent Assets	0	(572)
Contract costs	(4,992)	0	0	0
Lease liabilities	(5,558)	4,252	(4,673)	(3,505)
Prepaid expenses, prepaid income taxes, and other assets	(8,776)	0	1,553	4,586
Accounts payable, accrued expenses, income taxes payable and other liabilities	(23,674)	494	(1,740)	(7,909)
Increase (Decrease) in Deferred Revenue	22,431	27,392	22,252	6,327
Net cash provided by operating activities	28,962	63,987	54,800	15,205
Cash flows from investing activities:
Purchase of property, equipment and leasehold improvements	(2,263)	(3,165)	(6,185)	(2,459)
Payments for business acquisitions, net of cash acquired	5,571,931	0	1,588,802
Payments for equity method investments	(24)	0	0	0
Payments for capitalized computer software development costs	(508)	0	0	0
Payments for Purchase of Other Assets	(553)	(123)	(5)	(3)
Net Cash Provided by (Used in) Investing Activities, Total	(5,575,188)	(1,591,025)	(1,594,982)	(2,456)
Cash flows from financing activities:
Issuance of shares of common stock	5,702	0	0	0
Payment of tax withholding obligations related to restricted stock	(1,676)	0	0	0
Deferred business acquisition payments	(1,200)	0	0	0
Repayments of amounts borrowed			0	0
Payments of Debt Issuance Costs			1,551,537	17,874
Net cash provided by (used in) financing activities	5,968,821	1,536,341	1,551,537	(17,874)
Effect of exchange rate changes on cash and cash equivalents	1,417	(143)	(141)	(551)
Increase (decrease) in cash and cash equivalents	424,012	9,160	11,214	(5,676)
Cash and cash equivalents, beginning of period	25,713	14,499	14,499	20,175
Cash and cash equivalents, end of period	449,725	23,659	25,713	14,499
Supplemental disclosure of cash flow information:
Income taxes paid, net	84,997		9,600	6,600
Interest paid	237		693	1,009
Supplemental disclosure of non-cash activities:
Change in purchases of property, equipment and leasehold improvements included in accounts payable and accrued expenses	(363)		483	0
Lease liabilities arising from obtaining right-of-use assets	280		219	0
Proceeds from Sale of Property, Plant, and Equipment	$ (91)	$ (1,587,737)	$ 0	$ 0