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Note 12 - Income Taxes - Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	May 01, 2021	May 02, 2020
Accrued warranty obligations	$ 6,293	$ 6,202
Vacation accrual	1,222	1,753
Deferred maintenance revenue	398	987
Allowance for excess and obsolete inventory	1,776	1,318
Legal reserve	0	503
Equity compensation	324	396
Allowance for doubtful accounts	829	546
Inventory capitalization	583	822
Accrued compensation and benefits	1,707	539
Unrealized loss on foreign currency exchange	85	0
Net operating loss carry forwards	856	919
Research and development tax credit carry forwards	516	1,975
Lease accounting - lease liability	1,572	2,099
Other	1,513	1,035
Total deferred tax assets	17,674	19,094
Valuation allowance	(1,732)	(1,189)
Net deferred tax assets	15,942	17,905
Property and equipment	(2,373)	(2,141)
Lease accounting - right of use asset	(1,580)	(2,103)
Prepaid expenses	(337)	(440)
Intangible assets	(69)	(317)
Unrealized gain on foreign currency exchange	0	(17)
Other	(49)	(68)
Total deferred tax liabilities	(4,408)	(5,086)
Net deferred tax asset	11,534	12,819
Non-current assets	11,944	13,271
Non-current liabilities	$ (410)	$ (452)

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319

+ Details

Name:	us-gaap_DeferredTaxLiabilitiesUnrealizedCurrencyTransactionGains
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant