Note 5 - Revenue 2 (Details Textual) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01	Sep. 30, 2019 USD ($)
Revenue, Remaining Performance Obligation, Amount	$ 523,000
Revenue, Remaining Performance Obligation, Percentage	100.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Accounts Payable and Accrued Liabilities [Member]
Contract with Customer, Liability, Total	$ 110,000