Consolidated Statements of Income - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Operating Revenues
Regulated revenues	$ 17,193,029	$ 23,144,565	$ 33,900,724	$ 45,390,815
Non-regulated revenues	9,009,433	11,940,742	19,368,508	28,891,063
Total operating revenues	26,202,462	35,085,307	53,269,232	74,281,878
Operating Expenses
Regulated purchased natural gas	5,955,375	11,913,926	10,013,224	21,001,704
Non-regulated purchased natural gas	6,929,237	9,650,709	14,973,544	23,164,565
Operation and maintenance	3,913,345	3,859,474	10,817,796	10,921,700
Depreciation and amortization	1,615,928	1,640,786	4,828,587	4,732,493
Taxes other than income taxes	704,309	734,012	2,205,884	2,115,853
Total operating expenses	19,118,194	27,798,907	42,839,035	61,936,315
Operating Income	7,084,268	7,286,400	10,430,197	12,345,563
Other Income (Expense), Net	5,551	29,375	(29,362)	30,565
Interest Expense	624,722	641,703	1,906,592	1,958,841
Net Income Before Income Taxes	6,465,097	6,674,072	8,494,243	10,417,287
Income Tax Expense	2,481,656	2,518,936	3,231,908	3,916,742
Net Income	$ 3,983,000	$ 4,155,000	$ 5,262,335	$ 6,500,545
Earnings Per Common Share (Note 11)
Basic (in dollars per share)	$ 0.56	$ 0.59	$ 0.74	$ 0.92
Diluted (in dollars per share)	0.56	0.59	0.74	0.92
Dividends Declared Per Common Share (in dollars per share)	$ 0.205	$ 0.20	$ 0.615	$ 0.60
Retained Earnings [Member]
Operating Expenses
Net Income	$ 3,983,441	$ 4,155,136	$ 5,262,335	$ 6,500,545