Consolidated Balance Sheets Parenthetical - USD ($)	Jun. 30, 2016	Jun. 30, 2015
Current Assets
Accounts receivable, allowances for doubtful accounts	$ 301,000	$ 258,000
Other Assets
Cash surrender value of life insurance, face amount	$ 954,000	$ 951,000
Shareholders' Equity
Common shares, par value (in dollars per share)	$ 1	$ 1
Common shares, authorized (in shares)	20,000,000	20,000,000