Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v2.4.0.6
Stock-Based Compensation (Details) (USD $)
3 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2012
Stock options
Jun. 30, 2011
Stock options
Jun. 30, 2012
Stock options
Jun. 30, 2011
Stock options
Dec. 31, 2011
Stock options
Jun. 30, 2012
Stock options
High end of range
Dec. 31, 2011
Stock options
High end of range
Jun. 30, 2012
Stock options
Low end of range
Dec. 31, 2011
Stock options
Low end of range
Jun. 30, 2012
2005 Plan
Non-employee directors
Jun. 30, 2012
2005 Plan
Non-employee directors
Jun. 30, 2012
2005 Plan
Non-qualified stock options
Jun. 30, 2012
2005 Plan
Stock options
Jun. 30, 2012
2005 Plan
Stock options
Non-employee directors
Jun. 30, 2012
2005 Plan
Stock options
Non-employee directors (other than the Chairman of the Board)
item
Jun. 30, 2012
2005 Plan
Stock options
Chairman of the Board
item
Mar. 31, 2011
2005 Plan
Stock options
Terminated employees
Jun. 30, 2012
2005 Plan
Stock options
Employees
Dec. 31, 2011
2005 Plan
Stock options
Employees
Jun. 30, 2012
2005 Plan
Restricted common stock
Mar. 31, 2012
2005 Plan
Restricted common stock
Jun. 30, 2012
2005 Plan
Restricted common stock
Jun. 30, 2012
2005 Plan
Restricted common stock
Jun. 30, 2012
Stock Purchase Plan
Stock-Based Compensation                                                
Exercise price of non-qualified stock options relative to fair market value on the grant date (as a percent)                       85.00%                        
Annual grant once initial grant vests (in shares)                             22,500                  
Vesting period                   1 year               3 years            
Vesting period                           3 years                    
Number of equal quarterly installments                             4 4                
Options cancelled (in shares)     475,000                           173,000              
Exercise price of options cancelled (in dollars per share)     $ 0.24                           $ 0.24              
Exercise price of options granted (in dollars per share)     $ 0.17                           $ 0.24              
Stock compensation expense $ 32,000 $ 63,000 $ 53,000 $ 93,000                         $ 2,000         $ 40,000 $ 246,000  
Shares issued in exchange for certain investor relations and relating consulting services                                       208,334 625,000      
Period for which shares are restricted from being sold from the date of issuance                                             6 months  
Number of shares of common stock available to be granted                         674,156                      
Number of Options                                                
Outstanding at the beginning of the period (in shares)     5,602,000                                          
Granted (in shares)     468,000               112,500         45,000 173,000 355,000 565,000          
Granted (in shares)                           45,000                    
Expired (in shares)     (3,000)                                          
Forfeited (in shares)     (475,000)                           (173,000)              
Outstanding at the end of the period (in shares) 5,592,000   5,592,000   5,602,000                                      
Exercisable at the end of the period (in shares) 4,404,000   4,404,000                                          
Weighted Average Exercise Price                                                
Outstanding at the beginning of the period (in dollars per share)     $ 0.21                                          
Granted (in dollars per share)     $ 0.17                           $ 0.24              
Expired (in dollars per share)     $ 0.55                                          
Forfeited (in dollars per share)     $ 0.24                           $ 0.24              
Outstanding at the end of the period (in dollars per share) $ 0.21   $ 0.21   $ 0.21                                      
Exercisable at the end of the period (in dollars per share) $ 0.21   $ 0.21                                          
Average Remaining Contractual Life (Years)                                                
Outstanding at the end of a period, Average Remaining Contractual Life     3 years 7 months 13 days                                          
Exercisable at the end of a period, Average Remaining Contractual Life     2 years 7 months 6 days                                          
Aggregate Intrinsic Value                                                
Outstanding at the end of a period, Aggregate Intrinsic Value 96,975,000   96,975,000                                          
Exercisable at the end of a period, Aggregate Intrinsic Value 64,833,000   64,833,000                                          
Total unrecognized compensation cost related to unvested options $ 88,000   $ 88,000                                          
Weighted average period for recognition of unrecognized compensation cost     1 year 9 months 29 days                                          
Weighted average fair value of options issued (in dollars per share) $ 0.16 $ 0.08       $ 0.17 $ 0.13 $ 0.12 $ 0.12                              
Assumptions used                                                
Expected life           6 years 6 years 5 years 1 year                              
Risk-free interest rate, minimum (as a percent)     0.19%   2.20%                                      
Risk-free interest rate, maximum (as a percent)     0.69%   2.65%                                      
Volatility, minimum (as a percent)     204.10%   116.70%                                      
Volatility, maximum (as a percent)     216.20%   121.60%                                      
Value of options granted (in dollars per share) $ 0.16 $ 0.08       $ 0.17 $ 0.13 $ 0.12 $ 0.12                              
Period of intervals for purchase of shares of common stock by all eligible employees                                               6 months
Share purchase price as percentage of average of closing bid and ask prices                                               95.00%
Value of shares as a percent of gross compensation                                               10.00%
Shares reserved for future issuance                                               294,461