Note 5 - Geographic Information and Major Customer and Product Data (Details) - Summary of Long-lived Assets by Geographic Region (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Long-lived assets by geographic region:
Long-lived assets	$ 5,474	$ 3,989
UNITED STATES
Long-lived assets by geographic region:
Long-lived assets	3,771	2,146
ISRAEL
Long-lived assets by geographic region:
Long-lived assets	1,520	1,648
Rest of the World [Member]
Long-lived assets by geographic region:
Long-lived assets	$ 183	$ 195