Note 2 - Basis of Presentation and Summary of Significant Accounting Policies (Details) - Reconciliation of Basic and Diluted Loss per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basic and diluted loss per share:
Net loss	$ (4,070)	$ (1,428)
Basic and diluted loss per share:
Weighted average shares outstanding	51,725	44,699
Basic and diluted net loss per share	$ (0.08)	$ (0.03)