Note 13 - Segment and Geographical Information (Detail) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Revenues by Country	$ 127,777	$ 106,742	$ 251,515	$ 173,330
United States [Member]
Revenues:
Revenues by Country	88,463	82,685	175,657	139,543
Canada [Member]
Revenues:
Revenues by Country	7,018	5,597	13,904	10,297
United Kingdom [Member]
Revenues:
Revenues by Country	$ 32,296	$ 18,460	$ 61,954	$ 23,490

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration