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Treasury Stock - Additional Information (Details) - Common Stock - Share Repurchase Program August 2017 - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended
	Aug. 31, 2017	Sep. 30, 2017	Sep. 30, 2017
Equity Class Of Treasury Stock [Line Items]
Stock repurchase, shares		52,200	52,200
Stock repurachse, average price per share		$ 8.98	$ 8.98
Stock repurchase, cost		$ 468,823	$ 468,823
Board of Directors
Equity Class Of Treasury Stock [Line Items]
Stock approved for repurchase, value	$ 7,000,000
Period of stock repurcahse program	12 months

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Amount of stock repurchase plan authorized.

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Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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