Note 9 - Common Stock (Detail) - Combined Stock Option Activity (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Number of Options	1,332	1,470	1,450
Weighted Average Option Price (in Dollars per share)	$ 4.21	$ 5.00	$ 8.16
Aggregate Intrinsic Value (in Dollars)	$ 1,724	$ 0	$ 0
Exercisable at December 31, 2012	544
Exercisable at December 31, 2012 (in Dollars per share)	$ 5.75
Exercisable at December 31, 2012 (in Dollars)	167
Number of Options Granted	1,095	370	443
Weighted Average Option Price, Granted (in Dollars per share)	$ 3.94	$ 2.98	$ 1.71
Number of Options Exercised	(176)	(107)	0
Weighted Average Option Price, Exercised (in Dollars per share)	$ 4.71	$ 4.92
Number of Options Canceled	(198)	(401)	(423)
Weighted Average Option Price, Canceled (in Dollars per share)	$ 3.79	$ 5.77	$ 12.42
Number of Options	2,053	1,332	1,470
Weighted Average Option Price (in Dollars per share)	$ 4.06	$ 4.21	$ 5.00
Aggregate Intrinsic Value (in Dollars)	$ 448	$ 1,724	$ 0