Note 12 - Stockholders' Equity (Details Textual) - USD ($)		12 Months Ended
	Apr. 22, 2015	Dec. 31, 2016	Dec. 31, 2015
Common Stock, Shares Authorized		20,000,000	20,000,000
Common Stock, Par or Stated Value Per Share		$ 0.01	$ 0.01
Special Stock Shares Authorized		2,000,000
Stock Repurchase Program, Authorized Amount	$ 5,000,000
Stock Repurchased and Retired During Period, Shares	230,729		230,729
Stock Repurchased and Retired During Period, Price Per Share	$ 3
Stock Repurchased and Retired During Period, Value	$ 692,000
Special Stock Shares Outstanding		$ 0