Stock Repurchase Program (Details) - Common Stock - USD ($)	3 Months Ended			6 Months Ended	9 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2018	Feb. 21, 2018	Apr. 25, 2017
Equity, Class of Treasury Stock [Line Items]
Repurchased Amount	$ 409,143	$ 3,012,869	$ 2,717,871		$ 6,139,883
Remaining authorized repurchase amount	$ 23,900,000			$ 23,900,000	$ 23,900,000
15 Million Authorization Expansion, Expiring April 25, 2019
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount							$ 15,000,000.0
15 Million Authorization, Expiring April 25, 2019 [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchased Amount				$ 6,100,000
February 2018, 15 Million Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount						$ 15,000,000.0