Geographical Data (Detail) - USD ($) $ in Thousands		3 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Net Sales	[1]	$ 23,376	$ 21,174
Total Identifiable Assets		77,248		$ 73,269
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Net Sales	[1]	22,873	20,652
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Net Sales	[1]	503	$ 522
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Identifiable Assets		54,244		52,928
Dominican Republic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Identifiable Assets	[2]	$ 23,004		$ 20,341

[1] All of the Company's sales originate in the United States and are shipped primarily from the Company's facilities in the United States. There were no sales into any one foreign country in excess of 10% of total Net Sales.

[2] Consists primarily of inventories (September 30, 2018 = $19,427, June 30, 2018 = $16,592) and long-lived assets (September 30, 2018 = $3,399, June 30, 2017 = $3,462) located at the Company's principal manufacturing facility in the Dominican Republic.