Leases (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Lessee, Lease, Description [Line Items]
Lease initial term	12 months		12 months
Total rental payments		$ 2,533		$ 4,820
Revenue included embedded operating leases	$ 1,561		$ 3,125
Disposal Groups [Member]
Lessee, Lease, Description [Line Items]
Non-cash impairment charge			$ 1,110