Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Operating Loss Carryforwards [Line Items]
Change in valuation allowance		$ (3,309)	$ (147)
Valuation allowance	$ 4,399	4,399	1,095
Alternative minimum tax	95	95
Portion of tax loss carryforward offset by unrealized stock compensation deduction		5
Liability for uncertain tax positions, excluding any related interest and penalties	69	69	105
Portion of liability related to uncertain tax position which, if recognized, would impact the effective tax rate	69	69
Accrued (reversal of accrued) interest	21	21
Interest and penalties from continuing operations		3
Undistributed earnings of foreign subsidiaries	9,766	9,766
Revenue commissioners, Ireland | Subsidiaries
Operating Loss Carryforwards [Line Items]
Non US tax loss carryforward	6,132	6,132
Foreign tax authority
Operating Loss Carryforwards [Line Items]
Non US tax loss carryforward	575	575
Domestic tax authority
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	3,259
Deferred tax assets, net			$ 838
Valuation allowance	3,902	3,902
Non US tax loss carryforward	520	520
State tax authority
Operating Loss Carryforwards [Line Items]
Non US tax loss carryforward	165	165
State and local jurisdiction
Operating Loss Carryforwards [Line Items]
Non US tax loss carryforward	$ 10,583	$ 10,583