Note 6 - Related-Party Transactions (Detail) - Accrued expenses (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accrued expenses due to affiliates:
Total accrued expenses due to affiliates	$ 1,276	$ 705	[1]

[1] The Balance Sheet at December 31, 2012, is excerpted from the consolidated audited financial statements as of that date but does not include certain information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.