Segment Reporting and Geographic Information (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 32,311	$ 29,408	$ 87,408	$ 90,664
UK [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	21,190	21,572	60,259	66,606
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	3,996	5,126	12,446	15,500
Greece [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	4,475		5,765
Rest of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 2,650	$ 2,710	$ 8,938	$ 8,558