Stockholders' Equity (Details)			9 Months Ended
	Oct. 23, 2017	Oct. 05, 2017	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 05, 2017 USD ($) SubscriptionRight $ / shares	Dec. 31, 2016 USD ($) shares	Aug. 29, 2011 shares
Equity Class Of Treasury Stock [Line Items]
Number of shares authorized and available for repurchase (in shares)			540,000			100,000
Treasury stock, shares (in shares)			81,584		81,584
Value of repurchased common stock | $			$ 580,000		$ 580,000
Distribution charge of common stock transferable subscription rights | $				$ 0
Number of transferable subscription rights for each common stock owned | SubscriptionRight				3
Percentage of share of common stock holder is entitled to purchase by each subscription right				0.25%
Common stock subscription price | $ / shares				$ 5.50
Initial subscription rights period, expiration date			Oct. 10, 2017
Estimated fair value of subscription rights | $			$ 10,000
Adjustments to additional paid in capital net impact of subscription rights fair value | $			$ 0
Dividend declaration date			Aug. 06, 2013
Dividend date of record			Jul. 29, 2013
Number of warrants received for each share of common stock (in shares)			5
Number of warrants that entitle holder to purchase one share of common stock (in shares)			25
Number of common shares callable by warrants (in shares)			1
Warrant exercise price (in dollars per share) | $ / shares			$ 7.50
Minimum volume weighted average price per share (in dollars per share) | $ / shares			15.00
Subsequent Event [Member]
Equity Class Of Treasury Stock [Line Items]
Subscription rights extended expiration of offering period date	Nov. 13, 2017	Oct. 25, 2017
Over-subscription Right [Member]
Equity Class Of Treasury Stock [Line Items]
Common stock subscription price | $ / shares			$ 5.50