Income Taxes - CarryForwards (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Net operating loss (NOL) carryforwards
Deferred tax assets related to available federal and state NOL carryforwards		$ 35,800	$ 28,300
Deferred tax assets related to available foreign NOL carryforwards		8,964	8,586
Valuation allowance		44,257	8,474
Valuation allowance charge		35,800
Undistributed foreign earnings		10,700
Cash and cash equivalents held overseas on which taxes would be incurred upon repatriation		21,500	$ 23,600
Reconciliation of unrecognized tax benefits
Additions for tax positions of prior years	$ 725
Ending balance	725
Uncertain tax positions
Unrecognized tax benefits related to federal and state exposures	$ 725	725
Foreign
Net operating loss (NOL) carryforwards
NOLs subject to expiration		$ 300