Balance Sheets (Unaudited) (Parenthetical) (USD $)	Dec. 31, 2012	Jun. 30, 2012
Statement of Financial Position [Abstract]
Advance payments of contracts in process	$ 418,897	$ 511,502
Common stock, par value	$ 0.333	$ 0.333
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	3,029,874	3,029,874
Common stock, shares outstanding	2,344,543	2,320,822
Unearned ESOP, shares	126,666	136,666
Treasury stock, shares	685,331	709,052