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Share-Based Compensation Plan Information (Details) (USD $)
 12 Months Ended 9 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 3 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Sep. 30, 2013
2008 Plan [Member]
Dec. 31, 2013
2008 Plan [Member]
Dec. 31, 2012
2008 Plan [Member]
Dec. 31, 2011
2008 Plan [Member]
Dec. 31, 2013
2011 Plan [Member]
Dec. 31, 2012
2011 Plan [Member]
Dec. 31, 2011
2011 Plan [Member]
Sep. 30, 2013
Amended and Restated 2011 Plan [Member]
Dec. 31, 2013
1997 Plan [Member]
Dec. 31, 2013
1999 Plan [Member]
Dec. 31, 2013
2002 Plan [Member]
Dec. 31, 2013
Restricted Stock [Member]
2008 Plan [Member]
Jul. 31, 2009
July 2009 Non-vested Stock Award [Member]
Dec. 31, 2013
July 2009 Non-vested Stock Award [Member]
Dec. 31, 2010
December 2010 Stock Option Award [Member]
Dec. 31, 2013
December 2010 Stock Option Award [Member]
Jul. 31, 2012
July 2012 Stock Option Award [Member]
Dec. 31, 2013
July 2012 Stock Option Award [Member]
Sep. 30, 2013
September 2013 Stock Option Award [Member]
Dec. 31, 2013
September 2013 Stock Option Award [Member]
Jul. 31, 2011
July 2011 Stock Option Award [Member]
Dec. 31, 2013
July 2011 Stock Option Award [Member]
Dec. 31, 2013
All Other Stock Option Awards [Member]
Jul. 29, 2011
July 2011 Non-vested Stock Award [Member]
Dec. 31, 2013
July 2011 Non-vested Stock Award [Member]
Sep. 30, 2013
Chief Executive Officer [Member]
2011 Plan [Member]
Dec. 31, 2013
Chief Executive Officer [Member]
2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                            
Number of shares authorized under the Plan         5,000,000     1,500,000     3,500,000 2,400,000 2,000,000 3,000,000                                
Options granted in the period 2,325,000       325,000 900,000 905,000 2,000,000 1,225,000 75,000               500,000   700,350   325,000   132,700         2,000,000  
Granted                             205,532 500,000                     305,000      
Discretionary bonus       $ 100,000                                                    
Remaining shares available for grant under the Plan         2,936,850     1,375,250                                            
Contractual life of stock options and other awards under share-based compensation plans         10 years     10 years                                            
Option Vesting Schedule [Abstract]                                                            
Vesting percentage, year one                                                           25.00%
Vesting percentage, year two                                 25.00%   50.00%   33.00%   33.00%   33.00% 25.00%   33.00%   25.00%
Vesting percentage, year three                                 25.00%       34.00%   34.00%   34.00% 25.00%   34.00%   25.00%
Vesting percentage, year four                                 25.00%                 25.00%        
Vesting percentage, year five                                 25.00%                 25.00%        
Black-Scholes Assumptions [Abstract]                                                            
Expected life (years) 5 years 4 months 24 days 5 years 6 months 5 years 6 months                                                      
Expected volatility 89.60% 92.40% 92.60%                                                      
Expected dividend yield $ 0 $ 0 $ 0                                                      
Risk-free interest rate 1.50% 0.70% 1.60%                                                      
Weighted average fair value of options granted during the year $ 0.34 $ 0.47 $ 0.69                                                      
Options exercised in period 182,930 0 0   173,050     9,880                                            
Share-based compensation expense $ 643,000 $ 710,000 $ 647,000