Note 7 - Accrued Liabilities (Detail) - Accrued liabilities (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accrued liabilities:
Compensation and other benefit accruals	$ 2,778	$ 2,066
Accrued interest on Series A Preferred Stock	649	434
Other accruals	1,599	2,581
Total accrued liabilities	$ 5,026	$ 5,081