Note 12 - Operating Segments - Deferred Revenue Obligations (Details)	6 Months Ended
	Mar. 31, 2018 USD ($)
Subscription Arrangement [Member]
Deferred revenue	$ 3,284,000
Deferred Revenue, Additions	2,552,000
Deferred Revenue, Revenue Recognized	(2,719,000)
Deferred revenue	3,117,000
Deferred Installation Contracts [Member]
Deferred revenue	5,072,000
Deferred Revenue, Additions	2,623,000
Deferred Revenue, Revenue Recognized	(3,353,000)
Deferred revenue	4,342,000
Software Service, Support and Maintenance Arrangement [Member]
Deferred revenue	10,201,000
Deferred Revenue, Additions	7,221,000
Deferred Revenue, Revenue Recognized	(7,932,000)
Deferred revenue	$ 9,490,000