Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2013	Jun. 30, 2012
Statement of Financial Position [Abstract]
Advance payments of contracts in process	$ 216,827	$ 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	2,340,790	2,320,822
Unearned ESOP, shares	$ 126,666	$ 136,666
Treasury stock, shares	689,084	709,052