Note 17 - Industry Segment Information - Net Sales and Income (Loss) by Industry Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Revenue from Contract with Customer, Including Assessed Tax	$ 193,080	$ 189,142
Income from operations	22,645	18,651
Restructuring costs	(447)	(2,958)
Acquisition-related costs	(688)	(1,005)
Interest expense	(2,244)	(1,721)
Other non-operating income	(201)	29
Income from continuing operations before income taxes	20,200	16,959
Food Service Equipment Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	72,331	77,827
Income from operations	6,668	8,319
Restructuring costs	(21)	(1,216)
Engraving Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	35,979	32,829
Income from operations	7,547	7,596
Restructuring costs	(17)	(809)
Engineering Technologies Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	20,784	20,267
Income from operations	1,775	1,181
Restructuring costs	(47)	(766)
Electronics Products Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	51,450	46,816
Income from operations	12,787	10,283
Restructuring costs	(12)	(158)
Hydraulics Products Group [Member]
Revenue from Contract with Customer, Including Assessed Tax	12,536	11,403
Income from operations	1,583	1,872
Corporate and Other [Member]
Income from operations	(6,580)	(6,637)
Restructuring costs	$ (350)	$ (9)