Note 13 - Leases - Maturities of Lease Liabilities (Details) - USD ($)	Sep. 30, 2019	Jan. 01, 2019
2019, operating leases	$ 201,000
2019, financing leases	4,000
2020, operating leases	868,000
2020, financing leases	15,000
2021, operating leases	556,000
2021, financing leases	3,000
Total operating lease payments	1,625,000
Total financing lease payments	22,000
Less: operating lease interest	(101,000)
Less: financing lease interest	(2,000)
Total present value of operating lease liabilities	1,524,000	$ 1,800,000
Total present value of financing lease liabilities	$ 20,000