Stockholders' Equity (Details)	12 Months Ended
	Dec. 31, 2017 Vote $ / Right shares	Dec. 31, 2016 shares	Oct. 31, 2012 $ / shares shares
Class of Stock [Line Items]
Number of votes | Vote	100
Shares of Class A Preferred Stock Available Per Right	0.01
Threshold of days following requirements for exercise rights	10 days
Redemption price per right | $ / Right	0.01
Purchase price of preferred stock per Unit | $ / shares			$ 220
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred Class A
Class of Stock [Line Items]
Preferred stock, shares authorized	200,000	200,000	200,000
Minimum
Class of Stock [Line Items]
Threshold of common stock percentage for common stock diluted	15.00%
Ownership percentage of common stock	15.00%
Threshold of beneficial ownership of outstanding common stock for the Rights exchanging	15.00%
Threshold of percentage of assets or earning power sold or transferred for merger	50.00%
Threshold of prior acquisition common stock percentage for the Right exchanging	50.00%
Plan Amendment [Member]
Class of Stock [Line Items]
Purchase price of preferred stock per Unit | $ / shares			$ 80
Plan Amendment [Member] | Preferred Class A
Class of Stock [Line Items]
Preferred stock, shares authorized			100,000