Note 1 - Organization and Business (Details Textual)	6 Months Ended
Jun. 30, 2018
Number of Countries in which Entity Operates	53
UNITED STATES
Number of Medical Instruments Sold	0

The number of countries in which the entity operates as of balance sheet date.

No definition available.

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant