Note 9 - Promissory Notes (Details) - Actual Interest Expense and Amortization of Debt Discount (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Actual Interest Expense and Amortization of Debt Discount [Abstract]
Simple interest	$ 92	$ 224	$ 215	$ 482
Accretion of debt discount	55	99	123	208
Amortization of promissory notes issuance costs	21	29	38	61
	$ 168	$ 352	$ 376	$ 751