Income Taxes	6 Months Ended
Jun. 30, 2011
Income Tax Disclosure [Abstract]
Income Taxes	15. Income Taxes Under Internal Revenue Code (IRC) Section 382, the use of net operating loss carryforwards, capital loss carryforwards and other tax credit carryforwards may be limited if a change in ownership of a company occurs. If it is determined that due to transactions involving the Company's shares owned by its five percent stockholders a change of ownership has occurred under the provisions of IRC Section 382, the Company's net operating loss, capital loss and tax credit carryforwards could be subject to significant IRC Section 382 limitations. At December 31, 2010, the Company had approximately $573.4 million in Federal and state net operating loss carryforwards and $15.5 million in Federal research and experimentation tax credit carryforwards (of which $5.7 million represents an uncertain tax position), which resulted in $217.9 million and $9.8 million, respectively, in gross deferred tax assets that are recorded on the Company's balance sheet at December 31, 2010. These gross deferred tax assets are offset by a full valuation allowance, resulting in net deferred tax assets of zero. During 2011, as a result of certain equity transactions by five percent stockholders, an ownership change occurred for IRC Section 382 purposes. As a result of the ownership change, approximately $22 to$60 million of the Company's Federal and state net operating loss and recognized built in loss carryforwards are available. The remaining net operating loss and recognized built in loss carryforwards will expire prior to utilization. As a result, the Company's gross deferred tax asset and related valuation allowance will decrease by approximately $195 to $209 million. Additionally, the $15 million of Federal research and experimentation tax credit carryforwards will now expire prior to utilization, resulting in the Company's gross deferred tax asset and related valuation allowance decreasing by $9.8 million. These decreases have no impact on the Company's current financial position, results of operations, or cash flows because of the full valuation allowance. The adoption of the IRC Section 1374 approach prescribed in Notice 2003-65 with respect to the ownership change for the Company resulted in Net Unrealized Built in Losses which should result in Recognized Built in Losses during the five year recognition period of approximately $6.5 to $34 million. This will translate into unfavorable book to tax add backs in the Company's 2011 to 2016 U.S. Corporate Income Tax returns that will generate a gross deferred tax liability at the ownership change date of approximately $2.5 to $13 million and a corresponding reduction to the valuation allowance. This gross deferred tax liability will offset certain existing gross deferred tax assets (i.e. capitalized research expense). This has no impact on the Company's current financial position, results of operations, or cash flows because of the full valuation allowance. The Company is in the process of completing a formal IRC Section 382 study to determine the actual amount of the Federal and state net operating losses available and the actual amount of Built in Losses required to be recognized during the five year recognition period.

Income Taxes

6 Months Ended

Jun. 30, 2011

15. Income Taxes

Under Internal Revenue Code (IRC) Section 382, the use of net operating loss carryforwards, capital loss carryforwards and other tax credit carryforwards may be limited if a change in ownership of a company occurs. If it is determined that due to transactions involving the Company's shares owned by its five percent stockholders a change of ownership has occurred under the provisions of IRC Section 382, the Company's net operating loss, capital loss and tax credit carryforwards could be subject to significant IRC Section 382 limitations.

At December 31, 2010, the Company had approximately $573.4 million in Federal and state net operating loss carryforwards and $15.5 million in Federal research and experimentation tax credit carryforwards (of which $5.7 million represents an uncertain tax position), which resulted in $217.9 million and $9.8 million, respectively, in gross deferred tax assets that are recorded on the Company's balance sheet at December 31, 2010. These gross deferred tax assets are offset by a full valuation allowance, resulting in net deferred tax assets of zero. During 2011, as a result of certain equity transactions by five percent stockholders, an ownership change occurred for IRC Section 382 purposes. As a result of the ownership change, approximately $22 to$60 million of the Company's Federal and state net operating loss and recognized built in loss carryforwards are available. The remaining net operating loss and recognized built in loss carryforwards will expire prior to utilization. As a result, the Company's gross deferred tax asset and related valuation allowance will decrease by approximately $195 to $209 million. Additionally, the $15 million of Federal research and experimentation tax credit carryforwards will now expire prior to utilization, resulting in the Company's gross deferred tax asset and related valuation allowance decreasing by $9.8 million. These decreases have no impact on the Company's current financial position, results of operations, or cash flows because of the full valuation allowance.

The adoption of the IRC Section 1374 approach prescribed in Notice 2003-65 with respect to the ownership change for the Company resulted in Net Unrealized Built in Losses which should result in Recognized Built in Losses during the five year recognition period of approximately $6.5 to $34 million. This will translate into unfavorable book to tax add backs in the Company's 2011 to 2016 U.S. Corporate Income Tax returns that will generate a gross deferred tax liability at the ownership change date of approximately $2.5 to $13 million and a corresponding reduction to the valuation allowance. This gross deferred tax liability will offset certain existing gross deferred tax assets (i.e. capitalized research expense). This has no impact on the Company's current financial position, results of operations, or cash flows because of the full valuation allowance.

The Company is in the process of completing a formal IRC Section 382 study to determine the actual amount of the Federal and state net operating losses available and the actual amount of Built in Losses required to be recognized during the five year recognition period.