Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jul. 30, 2022	Jul. 31, 2021
Operating activities
Net loss	$ (8,389)	$ (13,918)
Adjustments to reconcile net loss from operations to cash provided by (used in) operating activities:
Depreciation and amortization	14,000	13,654
Loss from equity method investments	500	1,141
Amortization of debt issuance costs	211	129
Provision for doubtful accounts	23	(20)
Other non-cash expense, net	153	48
Non-cash lease expense	1,590	1,677
(Gain) loss on foreign currency transactions	(44)	19
Deferred income taxes	(381)	(472)
Stock-based compensation	2,217	1,922
Loss on disposal of property and equipment	485	379
Amortization of debt securities	130	90
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	8,053	17,914
Unbilled receivables and retentions	14,754	(14,684)
Inventories	(11,707)	(6,058)
Income taxes receivable	442	(326)
Prepaid expenses and other assets	46	481
Accounts payable	3,323	(7,997)
Other liabilities	(9,519)	(9,283)
Net cash provided by (used in) operating activities	15,887	(15,304)
Investing activities
Acquisition of property and equipment	(5,393)	(5,428)
Equity method investments	(2,774)	(2,692)
Business acquisitions, net of cash acquired		(46,150)
Redemptions of available-for-sale investments	13,280	17,925
Purchases of available-for-sale investments	(1,326)
Net cash provided by (used in) investing activities	3,787	(36,345)
Financing activities
Principal payments of term loan	(2,500)	(2,500)
Tax withholding payment related to net settlement of equity awards	(824)	(1,176)
Holdback and retention payments for business acquisition		(5,991)
Exercise of stock options		119
Other	(7)	(8)
Net cash used in financing activities	(3,331)	(9,556)
Effects of currency translation on cash and cash equivalents	(391)	(111)
Net increase (decrease) in cash, cash equivalents, and restricted cash	15,952	(61,316)
Cash, cash equivalents and restricted cash at beginning of period	77,231	157,063
Cash, cash equivalents and restricted cash at end of period	93,183	95,747
Cash paid, net during the period for:
Interest	2,169
Non-cash activities
Unrealized (gain) loss on available-for-sale investments, net of deferred tax expense of $6 and $0 for the three months ended July 30, 2022 and July 31, 2021, respectively	(20)	4
Change in foreign currency translation adjustments	(1,064)	(733)
Issuances of inventory to property and equipment, ISR in-service assets	3,364	6,881
Acquisitions of property and equipment included in accounts payable	$ 543	$ 821