Note 4 - Goodwill and Intangible Assets (Detail) - Components of the Company’s identifiable intangible assets are as follows: (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Net	$ 13,686	$ 14,617
Customer Relationships [Member]
Weighted average amortization life (years)	8 years 109 days	8 years 109 days
Cost	14,600	14,600
Accumulated Amortization	(4,417)	(3,728)
Net	10,183	10,872
Contract Backlog [Member]
Weighted average amortization life (years)	6 years 6 months	6 years 6 months
Cost	6,700	6,700
Accumulated Amortization	(3,201)	(2,961)
Net	3,499	3,739
Customer Contracts [Member]
Weighted average amortization life (years)	5 years 146 days	5 years 146 days
Cost	3,500	3,500
Accumulated Amortization	(3,496)	(3,494)
Net	4	6
Total [Member]
Weighted average amortization life (years)	7 years 146 days	7 years 109 days
Cost	24,800	25,400
Accumulated Amortization	(11,114)	(10,783)
Net	13,686	14,617
Trade Names [Member]
Weighted average amortization life (years)		1 year 6 months
Cost		600
Accumulated Amortization		$ (600)