Note 10 - Stockholders' Equity (Details) - RSU and Stock Option Activity (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended		3 Months Ended				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014 Restricted Stock Units (RSUs) [Member]	Mar. 31, 2014 Employee Stock Option [Member]	Mar. 31, 2014 Employee Stock Option [Member] Minimum [Member]	Mar. 31, 2014 Employee Stock Option [Member] Maximum [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2012 Maximum [Member]
Note 10 - Stockholders' Equity (Details) - RSU and Stock Option Activity [Line Items]
Options outstanding (in Shares)	3,775,534			3,192,849
Options outstanding, weighted average exercise price				$ 3.81
Options outstanding, exercise price range					$ 0.04	$ 4,153.00
Options outstanding, weighted average grant date fair value				$ 1.67
Options outstanding, aggregate intrinsic value (in Dollars)				$ 12,042
Exercisable at March 31, 2014 (in Shares)				2,917,809
Exercisable at March 31, 2014				$ 3.51
Exercisable at March 31, 2014					$ 0.04	$ 5,648.40
Exercisable at March 31, 2014 (in Shares)				1.64
Exercisable at March 31, 2014 (in Dollars)				14,507
Granted (in Shares)			715,955
Granted			$ 2.33
Granted (in Shares)	790,000	3,890,534		1,230,000
Granted	$ 1.15	$ 0.33		$ 2.53			$ 0.61	$ 0.03	$ 1.80	$ 2.00
Granted					$ 2.38	$ 4.67
Granted				$ 2.15
Granted (in Dollars)				2,818
Exercised (in Shares)			(415,955)
Exercised			$ 2.64
Expired (in Shares)				(276)
Expired				$ 5,648
Expired				$ 5,648.40
RSUs outstanding (in Shares)			300,000
RSUs outstanding, weighted average grant date fair value			$ 2.25
Options outstanding (in Shares)		3,775,534		4,422,573
Options outstanding, weighted average exercise price				$ 3.10
Options outstanding, exercise price range					$ 0.04	$ 4,153.00
Options outstanding, weighted average grant date fair value				$ 1.81
Options outstanding, aggregate intrinsic value (in Dollars)				$ 14,860