Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Dec. 31, 2011	Jun. 30, 2011
Current assets:
Accounts receivable, net of allowance for doubtful accounts	$ 33,000	$ 36,000
Equipment, accumulated depreciation	$ 3,611,000	$ 3,409,000
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	80,000,000	80,000,000
Common stock, shares issued (in shares)	16,381,366	16,346,366
Common stock, shares outstanding (in shares)	16,381,366	16,346,366