Note 1 - Summary of Accounting Policies (Details Textual)	6 Months Ended
	Jun. 30, 2016 USD ($)
Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years
Sales Credit Period	90 days
Impairment of Long-Lived Assets Held-for-use	$ 0