Share-Based Compensation Award Activity (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended				9 Months Ended			9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Feb. 27, 2013	Feb. 29, 2012	Sep. 30, 2013 Director Stock Plan [Member]	Sep. 30, 2012 Director Stock Plan [Member]	Sep. 30, 2013 Amended and Restated 2014 Plan [Member]	Sep. 30, 2013 Stock Options [Member]	Jul. 31, 2009 July 2009 Non-vested Stock Award [Member]	Sep. 30, 2013 July 2009 Non-vested Stock Award [Member]	Jul. 31, 2011 July 2011 Non-vested Stock Award [Member]	Sep. 30, 2013 July 2011 Non-vested Stock Award [Member]	Sep. 30, 2013 Non-Vested Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Exercised (options)			(60,550)	0
Exercised (weighted averaged exercise price)			$ 0.24
Options vested in period			1,498,850
Aggregate fair value of options vested in period			$ 0.7
Unrecognized compensation cost related to stock options										0.9
Weighted average period for recognition of compensation cost										2 years 6 months					9 months 18 days
Compensation expense allocated to selling, general and administrative expenses	0.4	0.2	0.8	0.5
Reversal of previously recorded share-based compensation expense	0.1	0	0.2	0
Unrecognized compensation cost															0
Non-vested Stock Awards
Aggregate shares granted							30,000	30,000			500,000		305,000
Aggregate shares of non-vested stock forfeited												337,500		112,500
Aggregate shares that vested in the period												150,000		155,100
Vesting Schedule for Equity Grants Other than Options
Vesting percentage, year one												0.00%		33.00%
Vesting percentage, year two												25.00%		33.00%
Vesting percentage, year three												25.00%		34.00%
Vesting percentage, year four												25.00%
Vesting percentage, year five												25.00%
ESPP
Stock Allocated During Period, Shares, Employee Stock Purchase Plan					233,000	273,000
Aggregate Grant-Date Fair Value, Employee Stock Purchase Plan					$ 0.03	$ 0.05
Other Stock Awards
Term over which grants will occur							10 years
Number of shares authorized under the plan (in shares)							600,000		2,000,000
Remaining shares available for grant under the plan (in shares)							360,000
Number of shares awarded annually to non-employee board members other than the non-executive chair							5,000
Number of shares awarded annually to non-executive chair of the board of directors							10,000
Aggregate shares granted							30,000	30,000			500,000		305,000