Property, Plant and Equipment (Details) (USD $)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Property, Plant and Equipment
Property, plant and equipment, at cost	$ 73,044,000		$ 71,144,000
Less accumulated depreciation	(32,090,000)		(31,003,000)
Property, plant and equipment, net	40,954,000		40,141,000
Impairment charges	0	0
Property, plant and equipment, net, held in foreign countries	1,200,000		1,300,000
Land
Property, Plant and Equipment
Property, plant and equipment, at cost	1,350,000		1,350,000
Building and improvements
Property, Plant and Equipment
Property, plant and equipment, at cost	32,844,000		32,992,000
Building and improvements | Minimum
Property, Plant and Equipment
Useful Lives	10 years
Building and improvements | Maximum
Property, Plant and Equipment
Useful Lives	39 years
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, at cost	33,814,000		32,620,000
Machinery and equipment | Minimum
Property, Plant and Equipment
Useful Lives	5 years
Machinery and equipment | Maximum
Property, Plant and Equipment
Useful Lives	10 years
Furniture and fixtures
Property, Plant and Equipment
Property, plant and equipment, at cost	1,292,000		1,290,000
Furniture and fixtures | Minimum
Property, Plant and Equipment
Useful Lives	5 years
Furniture and fixtures | Maximum
Property, Plant and Equipment
Useful Lives	7 years
Construction in progress
Property, Plant and Equipment
Property, plant and equipment, at cost	$ 3,744,000		$ 2,892,000