Quarterly report pursuant to Section 13 or 15(d)

Common Stock (Details Textual)

v2.4.0.8
Common Stock (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Jun. 30, 2013
Stock Option [Member]
Jun. 30, 2013
Minimum [Member]
Stock Option [Member]
Jun. 30, 2013
Maximum [Member]
Stock Option [Member]
Jun. 30, 2013
Restricted stock units [Member]
Jun. 30, 2013
Restricted stock units [Member]
Jun. 30, 2013
2010 Performance Incentive Plan [Member]
Jun. 30, 2013
2010 Performance Incentive Plan [Member]
Stock Option [Member]
Jun. 30, 2013
2010 Performance Incentive Plan [Member]
Restricted stock units [Member]
Stock Option [Member]
Jun. 18, 2012
MLV [Member]
Common Stock (Textual) [Abstract]                          
Common stock sales agreement aggregate offering amount                         $ 25
Common stock sales agreement commission in percentage                         3.00%
Restricted stock unit settlements   20,004 0                    
Options vesting period for directors           1 year 3 years            
Options expiry period           7 years 10 years            
Common shares reserved for issuance under various plans                     2,407,507    
Common shares reserved for options currently outstanding                     1,000,227 384,182  
Common shares available for future option grants                   1,023,098      
Options Vesting period for employees                 4 years        
Options vesting period for employees         four years                
Total unrecognized compensation expense related to the Company's restricted stock awards               3.0 3.0        
Weighted-average period, Restricted Stock Awards   2 years 7 months 6 days             3 years        
Stock-based compensation expense 0.2   0.2         0.4 0.7        
Common Stock (Additional Textual) [Abstract]                          
Common stock, shares authorized   50,000,000   25,000,000                  
Common stock, par value   $ 0.001   $ 0.001                  
Preferred stock, shares authorized   5,000,000                      
Preferred stock, par value   $ 0.001                      
Share base compensation by share base payment awards expiration dates   2015-10                      
Number of Optioned Common Shares, Option exercises   3,475 33,938                    
Unrecognized compensation expense related to stock options granted   $ 3.5   $ 2.7                  
Exercise price warrants exercised outstanding   $ 20                      
Warrants exercised outstanding   1,587,301                      
Effect on diluted per share on options, restricted stock units and warrants   3,000,000   2,600,000                  
Warrants exercised   0 0