Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2016	Jun. 30, 2015
Statement of Financial Position [Abstract]
Accounts and trade notes receivable, allowance for doubtful accounts	$ 160,000	$ 134,000
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	200,000	200,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.025	$ 0.025
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	7,065,500	7,065,500
Treasury stock, shares	31,768	31,768