Note 8 - Related Party Transactions (Details) - Amounts Included In Deferred Revenue Resulting From Deferral Of Upfront Payments Relating To Exclusive Supply Agreements With R-Tech (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Note 8 - Related Party Transactions (Details) - Amounts Included In Deferred Revenue Resulting From Deferral Of Upfront Payments Relating To Exclusive Supply Agreements With R-Tech [Line Items]
Deferred revenue, current	$ 1,148	$ 3,700
Deferred revenue, non-current	6,490	7,093
R-Tech [Member] | Purchase Commitment [Member]
Note 8 - Related Party Transactions (Details) - Amounts Included In Deferred Revenue Resulting From Deferral Of Upfront Payments Relating To Exclusive Supply Agreements With R-Tech [Line Items]
Deferred revenue, current	373	479
Deferred revenue, non-current	5,128	5,386
	$ 5,501	$ 5,865