Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended					12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Tax Credit Carryforward [Line Items]
Valuation allowance	$ 5,970					$ 5,970	$ 862
Net tax benefits	200	$ 500	$ 700	$ 400	$ 500	1,500	800	$ 1,500
Accrued income tax penalties and interest for unrecognized tax benefits	200					200	$ 300
Accumulated undistributed foreign earnings	31,500					31,500
Maximum
Tax Credit Carryforward [Line Items]
Estimated unrecognized deferred tax liability	600					600
State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
State research and development tax credits	900					900
United States Federal Tax Jurisdiction
Tax Credit Carryforward [Line Items]
U.S. capital loss carryforward	5,100					5,100
Foreign Tax Authority
Tax Credit Carryforward [Line Items]
Non-U.S. operating losses	$ 300					$ 300