Income Taxes	6 Months Ended
Jun. 30, 2012
Income Taxes [Abstract]
Income Taxes	12. Income Taxes Our utilization of net operating loss ("NOL") carryforwards may be subject to a substantial annual limitation due to ownership change provisions of Section 382 of the Internal Revenue Code of 1986, as amended (the "Code"), as well as similar state and foreign provisions. These provisions limit the amount of NOL carryforwards that can be utilized annually to offset future taxable income and income tax following an "ownership change," defined by Section 382 of the Code to mean a transaction or series of transactions over a three-year period resulting in an ownership change of more than 50 percentage points of the market value of a company by certain stockholders or public groups. As a result of our underwritten public offering on August 1, 2011, we experienced an ownership change. The Company is performing a study to determine the extent of the limitation. Due to the existence of the valuation allowance, future changes in the Company's unrecognized tax benefits will not impact its effective tax rate. Any carryforwards that expire prior to our utilization as a result of such limitations will be removed, if applicable, from deferred tax assets with a corresponding reduction of the valuation allowance.

Income Taxes

6 Months Ended

Jun. 30, 2012

12. Income Taxes

Our utilization of net operating loss ("NOL") carryforwards may be subject to a substantial annual limitation due to ownership change provisions of Section 382 of the Internal Revenue Code of 1986, as amended (the "Code"), as well as similar state and foreign provisions. These provisions limit the amount of NOL carryforwards that can be utilized annually to offset future taxable income and income tax following an "ownership change," defined by Section 382 of the Code to mean a transaction or series of transactions over a three-year period resulting in an ownership change of more than 50 percentage points of the market value of a company by certain stockholders or public groups. As a result of our underwritten public offering on August 1, 2011, we experienced an ownership change. The Company is performing a study to determine the extent of the limitation. Due to the existence of the valuation allowance, future changes in the Company's unrecognized tax benefits will not impact its effective tax rate. Any carryforwards that expire prior to our utilization as a result of such limitations will be removed, if applicable, from deferred tax assets with a corresponding reduction of the valuation allowance.