Note 17 - Industry Segment Information - Net Sales and Income (Loss) by Industry Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer, Including Assessed Tax	$ 195,522	$ 185,694	$ 388,609	$ 374,836
Income from operations	20,207	17,045	42,852	35,697
Restructuring costs	(177)	(1,775)	(624)	(4,732)
Acquisition-related costs	(859)	(703)	(1,547)	(1,708)
Interest expense	(3,123)	(1,793)	(5,368)	(3,514)
Other non-operating expense	(750)	(242)	(1,015)	(336)
Income from continuing operations before income taxes	16,334	15,010	36,469	31,847
Food Service Equipment Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	68,653	73,165	140,991	150,992
Income from operations	5,190	5,968	11,857	14,287
Restructuring costs	(346)	(1,131)	(367)	(2,071)
Engraving Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	38,485	33,879	74,466	66,708
Income from operations	6,849	6,958	14,398	14,540
Restructuring costs	(20)	(273)	(67)	(1,082)
Engineering Technologies Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	23,568	21,928	44,351	42,195
Income from operations	2,061	1,543	3,836	2,724
Restructuring costs	(99)	(269)	(116)	(1,034)
Electronics Products Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	52,700	46,035	104,150	92,851
Income from operations	10,376	10,269	23,163	20,552
Restructuring costs		(57)	(12)	(216)
Hydraulics Products Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	12,116	10,687	24,651	22,090
Income from operations	1,929	1,517	3,512	3,389
Corporate and Other [Member]
Income from operations	(5,162)	(6,732)	(11,743)	(13,355)
Restructuring costs	$ 288	$ (45)	$ (62)	$ (329)