7. Earnings (Loss) per common share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Earnings Loss Per Common Share Details
Net income (loss)	$ 94,400	$ (138,000)	$ 34,300	$ (299,300)
Weighted average common shares outstanding	1,489,112	1,479,112	1,489,112	1,475,960
Dilutive securities	0	0	0	0
Weighted average dilutive common shares outstanding	1,489,112	1,479,112	1,489,112	1,475,960
Basic earnings and diluted earnings (loss) per common share	$ .06	$ (.09)	$ .02	$ (.20)