Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (4,200)	$ (7,132)
Adjustments to reconcile net loss to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	19,436	21,585
Operating lease right-of-use assets	2,592	2,663
Loss on disposal of fixed assets	38	0
Share-based compensation expense	19,844	15,581
Change in fair value of derivative investment	(206)	0
Deferred income taxes	(11,456)	(3,290)
Other losses	363	0
Changes in assets and liabilities
Accounts receivable and unbilled costs	35,565	35,266
Inventories	(1,604)	4,156
Prepaid expenses and other assets	(1,157)	(10,793)
Accounts payable	(2,031)	(2,483)
Accrued compensation and other expenses	(37,677)	(23,772)
Operating lease liabilities	(2,907)	(3,085)
Income taxes payable	(2,717)	(1,607)
Deferred revenue	(36,251)	(39,610)
Net cash used in operating activities	(22,368)	(12,521)
Cash flows from investing activities:
Purchase of marketable securities and investments	(25,905)	(27,691)
Proceeds from sales and maturity of marketable securities	8,733	52,570
Purchase of fixed assets	(1,956)	(2,201)
Purchase of intangible assets	0	(161)
(Increase) decrease in deposits	(1)	5
Net cash (used in) provided by investing activities	(19,129)	22,522
Cash flows from financing activities:
Issuance of common stock under stock plans	2	1
Treasury stock repurchases, including accelerated share repurchases	0	(150,039)
Tax withholding on restricted stock units	(13,406)	(10,808)
Repayment of long-term debt	0	(150,000)
Net cash used in financing activities	(13,404)	(310,846)
Effect of exchange rate changes on cash and cash equivalents	823	(2,814)
Net decrease in cash and cash equivalents	(54,078)	(303,659)
Cash and cash equivalents, beginning of period	386,794	636,161
Cash and cash equivalents, end of period	332,716	332,502
Supplemental disclosures:
Cash paid for interest	1,587	1,310
Cash paid for income taxes	21,831	13,179
Non-cash transactions:
Transfers of inventory to fixed assets	1,114	1,212
Additions to property, plant and equipment included in accounts payable	$ 46	$ 382