Note 11 - Employee Benefit Plans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2013	Dec. 31, 2012 Temptronic Facility [Member]
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	10.00%	6.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Amount (in Dollars)	$ 5	$ 3
Defined Contribution Plan Employer Matching Contribution Vesting Period	4 years
Maximum Contribution Per Dollar		0.50

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