Income and other Taxes	3 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income and other Taxes	Income and other Taxes For the three months ended December 31, 2017 and 2016, the Company recorded income tax benefit (expense) from continuing operations of approximately $0.3 million and $(0.1) million, respectively. For the three months ended December 31, 2017 and 2016, the Company recorded no income tax benefit from discontinued operations. Income tax benefit for the three months ended December 31, 2017 is primarily comprised of the effect of the Tax Act which eliminates AMT and will result in a refund to the Company of amounts paid in prior fiscal years. Income tax expense is comprised of estimated alternative minimum tax allocated between continuing operations and discontinued operations as prescribed by ASC 740 and foreign tax expense included within continuing operations. For the three months ended December 31, 2017 and 2016, the effective tax rate on continuing operations was (80.2)% and 6.4%, respectively. The higher tax rate for the three months ended December 31, 2017 was primarily due to the effect of the Tax Act, which resulted in a credit to the Company on future tax payments for past AMT amounts paid. The lower tax rate for the three months ended December 31, 2016 compared to the current period was primarily due to permanent differences, state tax benefits and foreign tax rate differentials. The Company uses estimates to forecast the results from continuing operations for the current fiscal year as well as permanent differences between book and tax accounting. We have not provided for income taxes on non-U.S. subsidiaries' undistributed earnings as of December 31, 2017 because we plan to indefinitely reinvest the unremitted earnings of our non-U.S. subsidiaries and all of our non-U.S. subsidiaries historically have negative earnings and profits. All deferred tax assets have a full valuation allowance at December 31, 2017. However, on a quarterly basis, the Company will evaluate the positive and negative evidence to assess whether the more likely than not criteria, mandated by ASC 740, has been satisfied in determining whether there will be further adjustments to the valuation allowance. During the three months ended December 31, 2017 and 2016, there were no material increases or decreases in unrecognized tax benefits. As of December 31, 2017 and September 30, 2017, we had approximately $0.4 million and $0.3 million, respectively, of interest and penalties accrued as tax liabilities on our balance sheet. Interest that is accrued on tax liabilities is recorded within interest expense on the income statement. The Company’s Board of Directors has adopted a Tax Benefits Preservation Plan (the “Rights Plan”) to help preserve the value of our net operating losses and tax credit carryforwards by reducing the risk of limitation of these deferred tax assets. The Rights Plan was approved by the Company’s shareholders on March 10, 2015. On September 26, 2017, the Company extended the final expiration date of the rights contained therein from October 3, 2017 to October 3, 2018 (subject to earlier expiration as described in the Rights Plan). The Company has submitted the extension of the Rights Plan to shareholders for approval at the Company's 2018 annual meeting of shareholders, which is scheduled to be held on March 16, 2018. The Rights Plan is intended to reduce the likelihood that the Company will experience an ownership change for purposes of Internal Revenue Code Section 382 by discouraging any person or group from becoming a “5% shareholder” or increasing their ownership of the Company’s common stock if they are already a “5% shareholder.”

Income and other Taxes

For the three months ended December 31, 2017 and 2016, the Company recorded income tax benefit (expense) from continuing operations of approximately $0.3 million and $(0.1) million, respectively. For the three months ended December 31, 2017 and 2016, the Company recorded no income tax benefit from discontinued operations. Income tax benefit for the three months ended December 31, 2017 is primarily comprised of the effect of the Tax Act which eliminates AMT and will result in a refund to the Company of amounts paid in prior fiscal years. Income tax expense is comprised of estimated alternative minimum tax allocated between continuing operations and discontinued operations as prescribed by ASC 740 and foreign tax expense included within continuing operations.

For the three months ended December 31, 2017 and 2016, the effective tax rate on continuing operations was (80.2)% and 6.4%, respectively. The higher tax rate for the three months ended December 31, 2017 was primarily due to the effect of the Tax Act, which resulted in a credit to the Company on future tax payments for past AMT amounts paid. The lower tax rate for the three months ended December 31, 2016 compared to the current period was primarily due to permanent differences, state tax benefits and foreign tax rate differentials. The Company uses estimates to forecast the results from continuing operations for the current fiscal year as well as permanent differences between book and tax accounting.

We have not provided for income taxes on non-U.S. subsidiaries' undistributed earnings as of December 31, 2017 because we plan to indefinitely reinvest the unremitted earnings of our non-U.S. subsidiaries and all of our non-U.S. subsidiaries historically have negative earnings and profits.

All deferred tax assets have a full valuation allowance at December 31, 2017. However, on a quarterly basis, the Company will evaluate the positive and negative evidence to assess whether the more likely than not criteria, mandated by ASC 740, has been satisfied in determining whether there will be further adjustments to the valuation allowance.

During the three months ended December 31, 2017 and 2016, there were no material increases or decreases in unrecognized tax benefits. As of December 31, 2017 and September 30, 2017, we had approximately $0.4 million and $0.3 million, respectively, of interest and penalties accrued as tax liabilities on our balance sheet. Interest that is accrued on tax liabilities is recorded within interest expense on the income statement.

The Company’s Board of Directors has adopted a Tax Benefits Preservation Plan (the “Rights Plan”) to help preserve the value of our net operating losses and tax credit carryforwards by reducing the risk of limitation of these deferred tax assets. The Rights Plan was approved by the Company’s shareholders on March 10, 2015. On September 26, 2017, the Company extended the final expiration date of the rights contained therein from October 3, 2017 to October 3, 2018 (subject to earlier expiration as described in the Rights Plan). The Company has submitted the extension of the Rights Plan to shareholders for approval at the Company's 2018 annual meeting of shareholders, which is scheduled to be held on March 16, 2018. The Rights Plan is intended to reduce the likelihood that the Company will experience an ownership change for purposes of Internal Revenue Code Section 382 by discouraging any person or group from becoming a “5% shareholder” or increasing their ownership of the Company’s common stock if they are already a “5% shareholder.”