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Note 3 - Revenue From Contracts With Customers (Details Textual) - USD ($) $ in Thousands		3 Months Ended
	Jul. 01, 2018	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Jul. 01, 2017
Retained Earnings (Accumulated Deficit), Ending Balance	$ 760,397	$ 773,938		$ 761,430
Revenue from Contract with Customer, Including Assessed Tax		193,080	$ 189,142
Cost of Goods and Services Sold, Total		123,828	123,471
Accrued Liabilities, Current, Total	67,077	57,136		$ 57,679
Engineering Technologies Group [Member]
Revenue from Contract with Customer, Including Assessed Tax		20,784	20,267
Food Service Equipment Group [Member]
Revenue from Contract with Customer, Including Assessed Tax		$ 72,331	$ 77,827
Accounting Standards Update 2014-09 [Member]
Retained Earnings (Accumulated Deficit), Ending Balance	(1,033)				$ (1,000)
Revenue from Contract with Customer, Including Assessed Tax	(799)
Cost of Goods and Services Sold, Total	(574)
Accrued Liabilities, Current, Total	1,502
Accounting Standards Update 2014-09 [Member] \| Engineering Technologies Group [Member]
Retained Earnings (Accumulated Deficit), Ending Balance	100				$ 100
Revenue from Contract with Customer, Including Assessed Tax	700
Cost of Goods and Services Sold, Total	600
Accrued Liabilities, Current, Total	(1,500)
Accounting Standards Update 2014-09 [Member] \| Food Service Equipment Group [Member]
Accrued Liabilities, Current, Total	$ (1,500)