Note 4 - Acquisitions (Detail) - The preliminary purchase price allocation for the acquisition (USD $) In Thousands, unless otherwise specified	Nov. 07, 2011	Nov. 01, 2011	Jan. 31, 2011	Dec. 31, 2012 Ideal Image [Member]	Nov. 30, 2011 Ideal Image [Member]
Accounts receivable				$ 5,875
Other current assets				3,061
Property and equipment				6,666
Goodwill and intangible assets				241,360
Other assets				327
Accounts payable				(2,419)
Deferred tax liability				(18,075)
Deferred revenue				(63,223)
Accrued expenses				(5,696)
Common stock and additional paid-in capital				(5,660)
Cash used in acquisition, net of cash acquired	$ 33,000	$ 175,000	$ 4,500	$ 162,216	$ 175,000