Income Taxes	3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company's income tax expense was not material for any period presented in the condensed consolidated statement of operations. No amounts were recorded for unrecognized tax benefits or for the payment of interest and penalties during the three month periods ended March 31, 2017 and 2016. No federal or state tax benefits were recorded relating to the current year loss. The Company continues to believe that a full valuation allowance is required on its net deferred tax assets, with the exception of deferred income tax on the liabilities of certain indefinite-lived intangibles. The tax years 2013 through 2016 may be subject to federal examination and assessment. Tax years from 2008 through 2012 remain open solely for purposes of federal and certain state examination of net operating loss and credit carryforwards. State income tax returns may be subject to examination for tax years 2012 through 2016, depending on state tax statute of limitations. As of December 31, 2016, the Company had U.S. federal and state net operating loss carryforwards of $176.2 million and $143.0 million, respectively. There has been no significant change in these balances as of March 31, 2017. The net operating loss carryforwards, if not utilized, will expire in the years 2017 through 2036. No tax benefit has been reported since a full valuation allowance offsets these tax attributes. However, limitations could apply upon the release of the valuation allowance. Since the Company had changes in ownership during 2015, continuing into 2016 and 2017, additional limitations under IRC Section 382 of the Internal Revenue Code of 1986 may apply to the future utilization of certain tax attributes including net operating loss (“NOL”) carryforwards, other tax carryforwards, and certain built-in losses. Limitations on future net operating losses apply when a greater than 50% ownership change occurs under the rules of IRC Section 382. The Company has not had a formal study completed with respect to IRC Section 382, but the Company did complete its own analysis and determined that there has not been a greater than 50% change in ownership as of March 31, 2017. However, due to the shares issued in connection with the 2017 Private Offering and the Merger discussed in Note 12 to the condensed consolidated financial statements, the Company has determined that it is more likely than not that a greater than 50% change in ownership has occurred as of May 15, 2017. If confirmed, the allowance of future net operating losses will be limited to the market capitalization value multiplied by the “long-term tax-exempt rate” for the month in which the ownership change takes place. It is estimated that the Company would be limited to approximately $0.2 million of NOL per year, and due to expiring net operating loss provisions, the Company has estimated it would be unable to utilize approximately $172.7 million and $140.0 million of remaining federal and state net operating losses, respectively, in the future.

Income Taxes

The Company's income tax expense was not material for any period presented in the condensed consolidated statement of operations. No amounts were recorded for unrecognized tax benefits or for the payment of interest and penalties during the three month periods ended March 31, 2017 and 2016. No federal or state tax benefits were recorded relating to the current year loss. The Company continues to believe that a full valuation allowance is required on its net deferred tax assets, with the exception of deferred income tax on the liabilities of certain indefinite-lived intangibles.

The tax years 2013 through 2016 may be subject to federal examination and assessment. Tax years from 2008 through 2012 remain open solely for purposes of federal and certain state examination of net operating loss and credit carryforwards. State income tax returns may be subject to examination for tax years 2012 through 2016, depending on state tax statute of limitations.

As of December 31, 2016, the Company had U.S. federal and state net operating loss carryforwards of $176.2 million and $143.0 million, respectively. There has been no significant change in these balances as of March 31, 2017. The net operating loss carryforwards, if not utilized, will expire in the years 2017 through 2036. No tax benefit has been reported since a full valuation allowance offsets these tax attributes. However, limitations could apply upon the release of the valuation allowance.

Since the Company had changes in ownership during 2015, continuing into 2016 and 2017, additional limitations under IRC Section 382 of the Internal Revenue Code of 1986 may apply to the future utilization of certain tax attributes including net operating loss (“NOL”) carryforwards, other tax carryforwards, and certain built-in losses. Limitations on future net operating losses apply when a greater than 50% ownership change occurs under the rules of IRC Section 382. The Company has not had a formal study completed with respect to IRC Section 382, but the Company did complete its own analysis and determined that there has not been a greater than 50% change in ownership as of March 31, 2017. However, due to the shares issued in connection with the 2017 Private Offering and the Merger discussed in Note 12 to the condensed consolidated financial statements, the Company has determined that it is more likely than not that a greater than 50% change in ownership has occurred as of May 15, 2017. If confirmed, the allowance of future net operating losses will be limited to the market capitalization value multiplied by the “long-term tax-exempt rate” for the month in which the ownership change takes place. It is estimated that the Company would be limited to approximately $0.2 million of NOL per year, and due to expiring net operating loss provisions, the Company has estimated it would be unable to utilize approximately $172.7 million and $140.0 million of remaining federal and state net operating losses, respectively, in the future.