6. Earnings (Loss) Per Common Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income (loss)	$ (37,700)	$ 65,600	$ (351,500)	$ 62,200
Weighted average common shares outstanding	1,494,112	1,492,334	1,494,112	1,490,189
Effect of dilutive securities	0	38	0	1,309
Weighted average dilutive common shares outstanding	1,494,112	1,492,372	1,494,112	1,491,498
Basic earnings (loss) per common share	$ (0.03)	$ 0.04	$ (0.24)	$ 0.04
Diluted earnings (loss) per common share	$ (0.03)	$ 0.04	$ (0.24)	$ .04