Note 18 - Industry Segment Information - Net Sales and Income (Loss) by Industry Segments (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Revenue from Contract with Customer, Including Assessed Tax		$ 791,579	$ 770,452	$ 647,885
Depreciation and amortization		30,881	26,696	17,813
Income (Loss) from Operations		78,117	80,011	56,919
Property, Plant and Equipment, Additions	[1]	34,506	25,603	23,890
Restructuring charge		(1,635)	(6,964)	(5,761)
Acquisition-related costs		(3,075)	(3,749)	(7,843)
Other operating income (expense), net		(500)
Interest expense		(10,760)	(8,029)	(4,043)
Other, net		(1,744)	(1,735)	(1,917)
Income from continuing operations before income taxes		65,613	70,247	50,959
Engraving Group [Member]
Revenue from Contract with Customer, Including Assessed Tax		149,693	136,275	105,943
Depreciation and amortization		8,232	5,483	3,100
Income (Loss) from Operations		23,996	29,618	26,139
Property, Plant and Equipment, Additions	[1]	13,868	9,339	7,807
Restructuring charge		(662)	(1,687)	(6)
Electronics Products Group [Member]
Revenue from Contract with Customer, Including Assessed Tax		204,073	196,291	136,689
Depreciation and amortization		11,751	10,564	4,960
Income (Loss) from Operations		41,227	45,501	27,855
Property, Plant and Equipment, Additions	[1]	12,646	8,487	4,000
Restructuring charge		(354)	(299)	(499)
Engineering Technologies Group [Member]
Revenue from Contract with Customer, Including Assessed Tax		105,270	90,781	90,506
Depreciation and amortization		5,963	6,006	5,976
Income (Loss) from Operations		11,169	6,506	9,758
Property, Plant and Equipment, Additions	[1]	3,857	3,581	6,510
Restructuring charge		(116)	(1,098)	(3,879)
Hydraulics Products Group [Member]
Revenue from Contract with Customer, Including Assessed Tax		53,943	48,169	41,150
Depreciation and amortization		708	750	730
Income (Loss) from Operations		8,891	7,398	6,802
Property, Plant and Equipment, Additions	[1]	935	1,394	1,058
Food Service Equipment Group [Member]
Revenue from Contract with Customer, Including Assessed Tax		278,600	298,936	273,597
Depreciation and amortization		3,825	3,493	2,704
Income (Loss) from Operations		22,773	28,131	23,633
Property, Plant and Equipment, Additions	[1]	3,143	2,544	4,097
Restructuring charge		(367)	(3,536)	(1,122)
Corporate and Other [Member]
Revenue from Contract with Customer, Including Assessed Tax
Depreciation and amortization		402	400	343
Restructuring charge		(136)	(344)	(255)
Corporate Segment [Member]
Income (Loss) from Operations		$ (24,729)	$ (26,430)	$ (23,664)

[1] Includes capital expenditures in accounts payable of $3.8 million, $0.4 million, and $0.4 million at June 30, 2019, 2018, and 2017 respectively.