Income Taxes (Details 4) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Income Taxes
R&D tax credit carryforward	$ 1,048
Valuation allowances
NYS investment tax credit carryforwards	1,901	$ 2,537
Foreign loss carryforwards	6,083	7,005
Foreign
Income Taxes
Net operating losses	17,022	19,600
Deferred foreign tax credit carryover on unremitted earnings
Income Taxes
Tax credit carryforwards	53,027	104,218
New York State (NYS) \| Investment tax credit
Income Taxes
Tax credit carryforwards	$ 1,901	$ 2,537

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible research tax credit carryforwards.

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Amount of valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from tax credit carryforwards for which it is more likely than not that a tax benefit will not be realized.

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