Note 1 - Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Customer Relationships [Member]
Cost	$ 12,311,000	$ 10,221,000
Weighted average life (Year)	9 years 146 days	9 years 219 days
Accumulated amortization	$ (4,490,000)	$ (3,199,000)
Net	7,821,000	7,022,000
Noncompete Agreements [Member]
Cost	$ 5,370,000	$ 5,000,000
Weighted average life (Year)	5 years 36 days	5 years
Accumulated amortization	$ (3,553,000)	$ (2,500,000)
Net	$ 1,817,000	$ 2,500,000