Note 3 - Revenue From Contracts With Customers - Revenue Disaggregated (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Net sales		$ 156,283	$ 153,697	$ 307,569	$ 309,669
Transferred at Point in Time [Member]
Net sales		147,167	144,229	290,638	293,717
Transferred over Time [Member]
Net sales		9,116	9,468	16,931	15,952
UNITED STATES
Net sales		91,392	92,460	183,506	186,502
Asia Pacific [Member]
Net sales		30,610	24,560	57,474	48,906
EMEA [Member]
Net sales	[1]	30,364	32,462	59,182	66,762
Other Americas [Member]
Net sales		3,917	4,215	7,407	7,499
Electronics Products Group [Member]
Net sales		60,156	45,834	115,427	92,452
Engraving Group [Member]
Net sales		37,950	38,256	74,351	76,687
Engraving Group [Member] | Engraving Services [Member]
Net sales		34,976	35,671	69,296	71,737
Engraving Group [Member] | Engraving Products [Member]
Net sales		2,974	2,585	5,055	4,950
Scientific Group [Member]
Net sales		17,893	15,414	34,556	30,164
Scientific Group [Member] | Scientific Products and Services [Member]
Net sales		17,893	15,414	34,556	30,164
Engineering Technologies Group [Member]
Net sales		17,507	26,495	35,140	51,139
Engineering Technologies Group [Member] | Engineering Technologies Components [Member]
Net sales		17,507	26,495	35,140	51,139
Specialty Solutions Group [Member]
Net sales		22,777	27,698	48,095	59,227
Specialty Solutions Group [Member] | Hydraulics Cylinders and Systems [Member]
Net sales		10,623	11,316	22,954	25,064
Specialty Solutions Group [Member] | Merchandising & Display [Member]
Net sales		6,041	8,692	13,239	18,515
Specialty Solutions Group [Member] | Pumps [Member]
Net sales		$ 6,113	$ 7,690	$ 11,902	$ 15,648

[1] EMEA consists primarily of Europe, Middle East and S. Africa.