Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Details) - Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Income Statements, Captions [Line Items]
Revenues	$ 152,354,000	$ 130,085,000	$ 457,205,000	$ 381,600,000
Costs and expenses:
Costs of revenues	100,831,000	86,080,000	300,333,000	251,476,000
Selling, general and administrative expenses	31,620,000	28,281,000	98,953,000	84,642,000
Depreciation and amortization	15,910,000	14,458,000	48,058,000	42,245,000
Total costs and expenses	148,361,000	128,819,000	447,344,000	378,363,000
Income (loss) from operations	3,993,000	1,266,000	9,861,000	3,237,000
Interest and other expenses, net	7,316,000	7,546,000	22,546,000	20,293,000
Loss before income taxes	(3,323,000)	(6,280,000)	(12,685,000)	(17,056,000)
Provision (benefit) for income taxes	(1,072,000)	(1,654,000)	(4,059,000)	(4,800,000)
Net loss	(2,251,000)	(4,626,000)	(8,626,000)	(12,256,000)
Comprehensive Income (Loss):
Foreign currency translation adjustments, net of tax	3,046,000	4,413,000	(6,936,000)	5,127,000
Total comprehensive income (loss)	795,000	(213,000)	(15,562,000)	(7,129,000)
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	93,963,000	84,785,000	280,634,000	260,442,000
Costs and expenses:
Costs of revenues	66,733,000	60,025,000	197,937,000	182,747,000
Selling, general and administrative expenses	15,902,000	15,003,000	51,306,000	47,449,000
Depreciation and amortization	7,730,000	8,480,000	24,609,000	25,881,000
Total costs and expenses	90,365,000	83,508,000	273,852,000	256,077,000
Income (loss) from operations	3,598,000	1,277,000	6,782,000	4,365,000
Interest and other expenses, net	5,512,000	5,937,000	16,859,000	16,391,000
Loss before income taxes	(1,914,000)	(4,660,000)	(10,077,000)	(12,026,000)
Provision (benefit) for income taxes	(3,451,000)	(3,692,000)	(8,329,000)	(6,938,000)
Net loss	1,537,000	(968,000)	(1,748,000)	(5,088,000)
Comprehensive Income (Loss):
Foreign currency translation adjustments, net of tax	(2,166,000)	(159,000)	516,000	(159,000)
Total comprehensive income (loss)	(629,000)	(1,127,000)	(1,232,000)	(5,247,000)
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Revenues	58,391,000	45,300,000	176,571,000	121,158,000
Costs and expenses:
Costs of revenues	34,098,000	26,055,000	102,396,000	68,729,000
Selling, general and administrative expenses	15,718,000	13,278,000	47,647,000	37,193,000
Depreciation and amortization	8,180,000	5,978,000	23,449,000	16,364,000
Total costs and expenses	57,996,000	45,311,000	173,492,000	122,286,000
Income (loss) from operations	395,000	(11,000)	3,079,000	(1,128,000)
Interest and other expenses, net	1,804,000	1,609,000	5,687,000	3,902,000
Loss before income taxes	(1,409,000)	(1,620,000)	(2,608,000)	(5,030,000)
Provision (benefit) for income taxes	2,379,000	2,038,000	4,270,000	2,138,000
Net loss	(3,788,000)	(3,658,000)	(6,878,000)	(7,168,000)
Comprehensive Income (Loss):
Foreign currency translation adjustments, net of tax	5,212,000	4,572,000	(7,452,000)	5,286,000
Total comprehensive income (loss)	$ 1,424,000	$ 914,000	$ (14,330,000)	$ (1,882,000)