Leases (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Lease initial term	12 months
Total rental payments		$ 2,287
Revenue included embedded operating leases	$ 1,564
Renewable Power Systems [Member]
Lessee, Lease, Description [Line Items]
Non-cash impairment charge	$ 1,136