Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Jun. 30, 2013
Statement of Financial Position [Abstract]
Progress payments	$ 142,616	$ 146,916
Common stock, par value	$ 0.3333	$ 0.3333
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	3,029,874	3,029,874
Common stock, shares outstanding	2,368,110	2,344,690
Treasury stock, shares	661,764	685,184