Note 7 - Income Taxes (Detail) - Net Operating Loss Carryforwards (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Net operating loss carryforwards	$ 19,577	$ 19,619
2012 [Member]
Net operating loss carryforwards		1,038
2019 [Member]
Net operating loss carryforwards	2,901	2,901
2021 [Member]
Net operating loss carryforwards	1,184	1,184
2022 [Member]
Net operating loss carryforwards	1,083	1,083
2023 [Member]
Net operating loss carryforwards	1,778	1,778
Thereafter [Member]
Net operating loss carryforwards	$ 12,631	$ 11,635