Income Taxes	9 Months Ended
Sep. 30, 2018
Income Taxes [Abstract]
Income Taxes	Note 8: Income Taxes On December 22, 2017, the President of the United States signed into law the Tax Cuts and Jobs Act (“TCJA”). This legislation makes broad and complex changes to the U.S. tax code, including, but not limited to, (i) reducing the U.S. federal statutory tax rate from 35% to 21%; (ii) eliminating the corporate alternative minimum tax (AMT) and changing how existing AMT credits can be realized; (iii) modifying the officer’s compensation limitation, and (iv) changing rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after December 31, 2017. Specifically, the TCJA limits the amount the Company is able to deduct for net operating loss carryforwards generated in taxable years beginning after December 31, 2017 to 80% of taxable income; however, these net operating loss carryforwards can be carried forward indefinitely. The Company recognizes the effects of changes in tax law, including the TCJA, in the period the law is enacted. Accordingly, the effects of certain provisions of the TCJA have been recognized in the financial statements for the year ended December 31, 2017. As a result of the change in law, the Company recorded a reduction to its deferred tax assets of $19.0 million and a corresponding reduction to its valuation allowance due to the reduction in the U.S. federal statutory rate from 35% to 21%. In addition, the Company expects to file a claim for a federal tax refund of approximately $0.2 million for its AMT credit carryforward in tax years 2018 to 2021 pursuant to the applicable provisions of the TCJA. The Company’s effective tax rate is calculated quarterly based upon current assumptions relating to the full year’s estimated operating results and various tax-related items. The Company’s effective tax rate for the three and nine month periods ended September 30, 2018 and 2017 was 0%. The difference between the effective tax rate of 0% and the U.S. federal statutory rate of 21% for the three and nine month periods ended September 30, 2018 and 2017 was primarily due to recognizing a full valuation allowance on deferred tax assets. As of September 30, 2018, the Company determined that based on all available evidence, both positive and negative, including the Company’s latest forecasts and cumulative losses in recent years, it was more likely than not that none of its deferred tax assets would be realized and therefore it continued to record a full valuation allowance. The Company’s net operating loss carryforward amounts expire through 2037 and are subject to certain limitations that may occur due to change in ownership provisions under Section 382 of the Internal Revenue Code and similar state provisions. Due to the Company’s operating loss carryforwards, all tax years remain open to examination by the major taxing jurisdictions to which the Company is subject. In the event that the Company is assessed interest or penalties at some point in the future, it will be classified in the financial statements as tax expense.

Note 8: Income Taxes

On December 22, 2017, the President of the United States signed into law the Tax Cuts and Jobs Act (“TCJA”). This legislation makes broad and complex changes to the U.S. tax code, including, but not limited to, (i) reducing the U.S. federal statutory tax rate from 35% to 21%; (ii) eliminating the corporate alternative minimum tax (AMT) and changing how existing AMT credits can be realized; (iii) modifying the officer’s compensation limitation, and (iv) changing rules related to uses and limitations of net operating loss carryforwards created in tax years beginning after December 31, 2017. Specifically, the TCJA limits the amount the Company is able to deduct for net operating loss carryforwards generated in taxable years beginning after December 31, 2017 to 80% of taxable income; however, these net operating loss carryforwards can be carried forward indefinitely. The Company recognizes the effects of changes in tax law, including the TCJA, in the period the law is enacted. Accordingly, the effects of certain provisions of the TCJA have been recognized in the financial statements for the year ended December 31, 2017. As a result of the change in law, the Company recorded a reduction to its deferred tax assets of $19.0 million and a corresponding reduction to its valuation allowance due to the reduction in the U.S. federal statutory rate from 35% to 21%. In addition, the Company expects to file a claim for a federal tax refund of approximately $0.2 million for its AMT credit carryforward in tax years 2018 to 2021 pursuant to the applicable provisions of the TCJA.

The Company’s effective tax rate is calculated quarterly based upon current assumptions relating to the full year’s estimated operating results and various tax-related items. The Company’s effective tax rate for the three and nine month periods ended September 30, 2018 and 2017 was 0%. The difference between the effective tax rate of 0% and the U.S. federal statutory rate of 21% for the three and nine month periods ended September 30, 2018 and 2017 was primarily due to recognizing a full valuation allowance on deferred tax assets.

As of September 30, 2018, the Company determined that based on all available evidence, both positive and negative, including the Company’s latest forecasts and cumulative losses in recent years, it was more likely than not that none of its deferred tax assets would be realized and therefore it continued to record a full valuation allowance.

The Company’s net operating loss carryforward amounts expire through 2037 and are subject to certain limitations that may occur due to change in ownership provisions under Section 382 of the Internal Revenue Code and similar state provisions.

Due to the Company’s operating loss carryforwards, all tax years remain open to examination by the major taxing jurisdictions to which the Company is subject. In the event that the Company is assessed interest or penalties at some point in the future, it will be classified in the financial statements as tax expense.