Note 5 - Leases - Supplemental Balance Sheet Information (Details) - USD ($)	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating lease assets	$ 5,018,000	$ 5,731,000
Finance lease assets	1,834,000
Total leased assets	6,852,000
Current operating lease liabilities	841,000			[1]
Current finance lease liabilities	476,000		337,000
Long-term operating lease liabilities	4,517,000			[1]
Long term finance lease liabilities	1,168,000		$ 951,000	[1]
Total lease liabilities	$ 7,002,000

[1] The balance sheet at December 31, 2018 has been derived from the audited financial statements at that date.