v3.19.3
Note 8 - Leases (Details Textual)
9 Months Ended 12 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Note To Financial Statement Details Textual        
Operating Lease, Expense $ 282,000 $ 174,000 $ 232,000 $ 225,000
Finance Lease, Liability, Total $ 0      
Lessee, Operating Lease, Not yet Commenced 0      
Lessee, Finance Lease, Not yet Commenced 0      
Sublease Income $ 104,000