Note 2 - Fair Value Measurement (Details) - Changes in the Fair Value of the Company's Level 3 Financial Liabilities (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Apr. 30, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance – beginning		$ 296,000
Change in fair value of warrant liability		22,000
Reclassification of liability to additional paid-in capital upon exercise of warrants		318,000
Ordinary Share Warrants [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance – beginning	306,000	296,000	318,000
Change in fair value of warrant liability	12,000	22,000
Reclassification of liability to additional paid-in capital upon exercise of warrants	(318,000)	(318,000)
Balance at June 30, 2014	$ 0	$ 0	$ 318,000