Quarterly report pursuant to sections 13 or 15(d)

Stock- Based Compensation (Details)

v2.4.0.6
Stock- Based Compensation (Details) (USD $)
 6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Summary of stock option activity    
Shares Available for Future Grant, Beginning Balance 353,953 423,618
Shares Available for Future Grant, Options granted at market (51,500) (224,250)
Shares Available for Future Grant, Options forfeited or expired 24,584 154,585
Shares Available for Future Grant, Ending Balance 327,037 353,953
Number of Shares Outstanding Under Option, Beginning Balance 737,020 670,355
Number of Shares Outstanding Under Option, Options granted at market 51,500 224,250
Number of Shares Outstanding Under Option, Options forfeited or expired (27,584) (157,585)
Number of Shares Outstanding Under Option, Ending Balance 760,936 737,020
Weighted Average Exercise Price, Beginning Balance $ 4.26 $ 4.60
Weighted Average Exercise Price, Options granted at market $ 0.53 $ 2.32
Weighted Average Exercise Price, Options forfeited or expired $ 4.20 $ 2.95
Weighted Average Exercise Price, Ending Balance $ 4.01 $ 4.26