Inventories (Details) (USD $)	Dec. 31, 2012	Jun. 30, 2012
Inventories [Abstract]
Raw materials	$ 9,641,000	$ 10,410,000
Work in process and finished parts	5,248,000	5,288,000
Finished goods	72,842,000	66,991,000
Total inventories	87,731,000	82,689,000
Inventories valued on the FIFO method	1,700,000	1,700,000
Inventories valued on the LIFO method	$ 2,500,000	$ 2,900,000