Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) shares	Sep. 30, 2018 shares	Sep. 30, 2019 USD ($) shares	Sep. 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	4,773,258	4,730,624	4,761,954	4,722,189
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	1,120		1,120
Operating Lease, Liability, Total	$ 1,120		$ 1,120
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset					$ 1,280
Operating Lease, Liability, Total					$ 1,280