Stock-based Compensation (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		96 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Stock-Based Compensation [Line Items]
Stock based compensation expense	$ 22,284	$ 15,993	$ 74,533	$ 42,051
Deferred tax benefit related to stock based compensation	1,765	$ 1,371	6,206	4,113
Unrecognized compensation costs	103,223		$ 103,223
Period in which compensation cost will be recognized			2 years
Deferred tax benefit related to unrecognized compensation costs	$ 8,530		$ 8,530
Outstanding, ending	173,050		173,050
Options granted			1,500
Aggregate intrinsic value of options exercised			$ 36,374	$ 53,242
Cash divided paid (in dollars per share)			$ 0.75	$ 0.75
2007 Plan [Member] | Stock Option Plans [Member]
Stock-Based Compensation [Line Items]
Authorized shares under plan	400,000		400,000
Outstanding, ending	162,250		162,250
Options granted					235,650
2000 Plan [Member] | Stock Option Plans [Member]
Stock-Based Compensation [Line Items]
Outstanding, ending	10,800		10,800