Note 12 - Operating Segments - Deferred Revenue Obligations (Details)	3 Months Ended
	Dec. 31, 2017 USD ($)
Subscription Arrangement [Member]
Deferred revenue	$ 3,284,000
Deferred Revenue, Additions	1,214,000
Deferred Revenue, Revenue Recognized	(1,363,000)
Deferred revenue	3,135,000
Deferred Installation Contracts [Member]
Deferred revenue	5,072,000
Deferred Revenue, Additions	530,000
Deferred Revenue, Revenue Recognized	(1,238,000)
Deferred revenue	4,364,000
Software Service, Support and Maintenance Arrangement [Member]
Deferred revenue	9,442,000
Deferred Revenue, Additions	4,705,000
Deferred Revenue, Revenue Recognized	(4,107,000)
Deferred revenue	$ 10,040,000