Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Jun. 30, 2012
Statement of Financial Position [Abstract]
Progress payments of costs related to contracts in process	$ 146,916	$ 511,502
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	2,344,690	2,320,822
Unearned ESOP, shares	$ 116,666	$ 136,666
Treasury stock, shares	685,184	709,082