Geographical Data (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Net Sales	[1]	$ 25,143	$ 22,200	$ 73,348	$ 64,486
Total Identifiable Assets		79,595		79,595		$ 73,269
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Net Sales	[1]	24,763	21,659	71,649	62,762
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Net Sales	[1]	380	$ 541	1,699	$ 1,724
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Identifiable Assets		53,299		53,299		52,928
Dominican Republic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Identifiable Assets	[2]	$ 26,296		$ 26,296		$ 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 (March 31, 2019 = $22,630, June 30, 2018 = $16,592) and long-lived assets (March 31, 2019 = $3,411, June 30, 2018 = $3,462) located at the Company's principal manufacturing facility in the Dominican Republic.