XML 50 R34.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stock Based Compensation (Details 5) (USD $)
12 Months Ended 3 Months Ended 24 Months Ended 3 Months Ended
Dec. 31, 2011
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2013
2000 Stock Incentive Plan
Dec. 31, 2012
2000 Stock Incentive Plan
Mar. 31, 2013
Restricted stock units
Mar. 31, 2012
Restricted stock units
Mar. 31, 2013
Restricted stock units
General and administrative expenses
Mar. 31, 2012
Restricted stock units
General and administrative expenses
Mar. 31, 2013
Restricted stock units
Research and development expenses
Mar. 31, 2013
Restricted stock units
Minimum
Mar. 31, 2013
Restricted stock units
Maximum
Mar. 31, 2012
Restricted stock units
Maximum
Research and development expenses
Stock Based Compensation disclosures                          
Number of common shares each award holder is entitled to receive           1              
Requisite service period of RSUs                     1 year 3 years  
Number of RSUs                          
Outstanding, beginning balance (in shares)           215,525              
Granted (in shares)           53,730              
Released (in shares)           (68,803)              
Outstanding, ending balance (in shares)           200,452              
Expected to Vest (in shares)           192,388              
Weighted Average Grant Price                          
Outstanding weighted average grant price (in dollars per share)           $ 6.26              
Granted (in dollars per share)           $ 6.67              
Released (in dollars per share)           $ 3.69              
Outstanding weighted average grant price (in dollars per share)           $ 7.26              
Expected to Vest (in dollars per share)           $ 7.25              
Allocated share-based compensation expense           $ 300,000 $ 300,000 $ 200,000 $ 300,000 $ 100,000     $ 100,000
Unrecognized compensation expense related to unvested RSU's           600,000              
Expected weighted average period for recognizing unrecognized compensation expense           10 months 24 days              
RSUs and stock options in excess of the per person annual sub-limits       1,400,000 1,400,000                
Reverse stock split 0.1                        
Liability for stock based compensation awards   $ 1,808,000 $ 1,204,000 $ 1,800,000