Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Detail) - Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues	$ 130,085,000	$ 109,218,000	$ 381,600,000	$ 282,548,000
Costs and expenses:
Costs of revenues	86,080,000	72,148,000	251,476,000	186,225,000
Selling, general and administrative expenses	28,281,000	22,803,000	84,642,000	58,785,000
Depreciation and amortization	14,458,000	13,069,000	42,245,000	33,153,000
Total costs and expenses	128,819,000	108,020,000	378,363,000	278,163,000
Income (loss) from operations	1,266,000	1,198,000	3,237,000	4,385,000
Interest and other expenses, net	7,546,000	5,287,000	20,293,000	9,513,000
Loss before income taxes	(6,280,000)	(4,089,000)	(17,056,000)	(5,128,000)
Provision (benefit) for income taxes	(1,654,000)	(1,412,000)	(4,800,000)	(1,820,000)
Net loss	(4,626,000)	(2,677,000)	(12,256,000)	(3,308,000)
Comprehensive Loss:
Foreign currency translation adjustments, net of tax	4,413,000	(2,627,000)	5,127,000	(2,857,000)
Total comprehensive income (loss)	(213,000)	(5,304,000)	(7,129,000)	(6,165,000)
Guarantor Subsidiaries [Member]
Revenues	84,785,000	78,054,000	260,442,000	217,597,000
Costs and expenses:
Costs of revenues	60,025,000	53,781,000	182,747,000	147,845,000
Selling, general and administrative expenses	15,003,000	13,441,000	47,449,000	40,336,000
Depreciation and amortization	8,480,000	8,848,000	25,881,000	24,569,000
Total costs and expenses	83,508,000	76,070,000	256,077,000	212,750,000
Income (loss) from operations	1,277,000	1,984,000	4,365,000	4,847,000
Interest and other expenses, net	5,937,000	5,204,000	16,391,000	7,738,000
Loss before income taxes	(4,660,000)	(3,220,000)	(12,026,000)	(2,891,000)
Provision (benefit) for income taxes	(3,692,000)	(1,316,000)	(6,938,000)	(1,408,000)
Net loss	(968,000)	(1,904,000)	(5,088,000)	(1,483,000)
Comprehensive Loss:
Foreign currency translation adjustments, net of tax	(159,000)		(159,000)	0
Total comprehensive income (loss)	(1,127,000)	(1,904,000)	(5,247,000)	(1,483,000)
Non-Guarantor Subsidiaries [Member]
Revenues	45,300,000	31,164,000	121,158,000	64,951,000
Costs and expenses:
Costs of revenues	26,055,000	18,367,000	68,729,000	38,380,000
Selling, general and administrative expenses	13,278,000	9,362,000	37,193,000	18,449,000
Depreciation and amortization	5,978,000	4,221,000	16,364,000	8,584,000
Total costs and expenses	45,311,000	31,950,000	122,286,000	65,413,000
Income (loss) from operations	(11,000)	(786,000)	(1,128,000)	(462,000)
Interest and other expenses, net	1,609,000	83,000	3,902,000	1,775,000
Loss before income taxes	(1,620,000)	(869,000)	(5,030,000)	(2,237,000)
Provision (benefit) for income taxes	2,038,000	(96,000)	2,138,000	(412,000)
Net loss	(3,658,000)	(773,000)	(7,168,000)	(1,825,000)
Comprehensive Loss:
Foreign currency translation adjustments, net of tax	4,572,000	(2,627,000)	5,286,000	(2,857,000)
Total comprehensive income (loss)	914,000	(3,400,000)	(1,882,000)	(4,682,000)
Parent Company [Member]
Revenues	0	0	0	0
Costs and expenses:
Costs of revenues	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Depreciation and amortization	0	0	0	0
Total costs and expenses	0	0	0	0
Income (loss) from operations	0	0	0	0
Interest and other expenses, net	0	0	0	0
Loss before income taxes	0	0	0	0
Provision (benefit) for income taxes	0	0	0	0
Net loss	0	0	0	0
Comprehensive Loss:
Foreign currency translation adjustments, net of tax	0	0	0	0
Total comprehensive income (loss)	$ 0	$ 0	$ 0	$ 0