Note 7 - Employee Benefit And Savings Plans (Detail)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Contribution Plan, Employer Matching Contribution, Percent	100.00%	100.00%	100.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	3.00%	3.00%	3.00%

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration