Geographical Data (Detail) - USD ($) $ in Thousands		3 Months Ended										12 Months Ended
		Jun. 30, 2017		Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016		Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Net Sales		$ 25,684		$ 20,807	$ 20,715	$ 20,168	$ 24,059		$ 19,808	$ 20,497	$ 18,149	$ 87,374		$ 82,513		$ 77,762	[1]
Total Identifiable Assets		70,862					64,769					70,862		64,769		65,037
Domestic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]											84,820		79,931		74,736
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]											2,554		2,582		3,026
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Identifiable Assets		55,550					51,272					55,550		51,272		50,998
Dominican Republic [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Identifiable Assets		$ 15,312	[2]				$ 13,497	[2]				$ 15,312	[2]	$ 13,497	[2]	$ 14,039

[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 (2017 = $11,831; 2016 = $10,076) and fixed assets (2017 = $3,233; 2016 = $3,311) located at the Company's principal manufacturing facility in the Dominican Republic.