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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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- Definition 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. + References No definition available. + Details
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