Common Stock and Stock Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	0 Months Ended	12 Months Ended				1 Months Ended		5 Months Ended			12 Months Ended
	Aug. 01, 2013	Jun. 17, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jul. 15, 2013	Jun. 30, 2012 2007 Plan	May 31, 2011 2007 Plan	May 31, 2012 2007 Plan	Dec. 31, 2013 2007 Plan	Dec. 31, 2007 2007 Plan	Dec. 31, 2013 Stock Options 2007 Plan	Dec. 31, 2013 Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to be repurchased (in shares)		400,000
Dutch tender offer, minimum (per share)		$ 12.00
Dutch tender offer, maximum (per share)		$ 14.00
Repurchase of common stock, shares	53,884
Stock repurchased price (dollars per share)	$ 14.00
Treasury stock value (in dollars)	$ 0.8
Stock repurchase as a percentage of total common stock outstanding (percent)						0.81%
Shares authorized											525,000
Additional shares authorized								200,000
Shares available for grant										313,577
Ratio of restricted stock unit grants that reduce the number of shares available for issuance							100.00%		200.00%
Term of award												10 years
Period from termination of employment to exercise awards												90 days
Exercises in period, intrinsic value				0.1	0.6
Granted, weighted average grant date fair value			$ 6.11	$ 7.42	$ 13.72
Total cash received from stock option exercises			$ 0.3	$ 0.4	$ 1.2
Award vesting period													3 years