Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017
Statement of Financial Position [Abstract]
Accounts and trade notes receivable, allowance for doubtful accounts	$ 159	$ 150
Preferred stock, par value	$ 1.0	$ 1.0
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	20,000,000	20,000,000
Common stock, shares issued	10,499,481	10,499,481
Treasury stock, shares	31,768	31,768