Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) shares	Jun. 30, 2018 shares	Jun. 30, 2019 USD ($) shares	Jun. 30, 2018 shares	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Number of Reportable Segments			2
Weighted Average Number of Shares Outstanding, Basic, Total | shares	4,763,858	4,724,124	4,756,209	4,717,901
Weighted Average Number Diluted Shares Outstanding Adjustment, Total | shares	0	0	0	0
Weighted Average Number of Shares, Contingently Issuable | shares	0	0	0	0
Finance Lease, Liability, Total	$ 0		$ 0
Operating Lease, Right-of-Use Asset	1,190		1,190
Operating Lease, Liability, Total	$ 1,190		$ 1,190
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset					$ 1,280
Operating Lease, Liability, Total					$ 1,280