Stockholders' Equity, Repurchase of Shares (Details) (USD $)	0 Months Ended	12 Months Ended
	Feb. 19, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stockholders' Equity [Abstract]
Common stock acquired (in shares)	1,000,000
Expiration period of stock options		7 years
Percentage of price reduced from closing price of shares reported by NASDAQ (in hundredths)	5.00%
Number of days taken as base for simple moving average		30 days
Formula produced price per share (in dollars per share)	$ 4.114
Exercise price of options (in dollars per share)	$ 2.32
Payments to purchase treasury stock	$ 1,800,000
Price per share of treasury stock acquired (in dollars per share)	$ 1.794
Share repurchase amount	$ 4,100,000	$ 0	$ 4,114,000	$ 0