Note 2 - Summary of Significant Accounting Policies (Detail) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended		12 Months Ended							3 Months Ended		3 Months Ended			3 Months Ended				12 Months Ended	3 Months Ended									3 Months Ended
	May 06, 2011	Jul. 31, 2011	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Jan. 15, 2012	Jul. 19, 2011	Jul. 07, 2011	Feb. 09, 2011	Dec. 31, 2010	Nov. 02, 2010	Mar. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Mar. 31, 2012 Restricted Stock [Member]	Mar. 31, 2011 Restricted Stock [Member]	Dec. 31, 2011 Restricted Stock [Member]	Mar. 31, 2012 Options and Warrants [Member]	Mar. 31, 2011 Options and Warrants [Member]	Mar. 31, 2011 Equity Component of Earnout Obligation [Member]	Mar. 31, 2012 Subordinated Unsecured Notes [Member]	Dec. 31, 2010 Subordinated Unsecured Notes [Member]	Mar. 31, 2012 Cash Paid to Settle 2009 and 2010 Acquisitions [Member]	Mar. 31, 2012 Release Of Restriction Associated With Shares Previously Issued [Member]	Mar. 31, 2012 Change In Fair Value [Member]	Mar. 31, 2012 General and Administrative Expense [Member]	Mar. 31, 2011 General and Administrative Expense [Member]	Mar. 31, 2012 Cost of Sales [Member]	Mar. 31, 2012 United States [Member]	Mar. 31, 2012 Accrued [Member]	Mar. 31, 2011 Cash Paid [Member]	Mar. 31, 2012 Stock Options [Member]	Mar. 31, 2012 2012 Incentive Compensation Plan [Member]	Mar. 31, 2012 Senior Unsecured Notes [Member]	Dec. 31, 2011 Senior Unsecured Notes [Member]
Allowance for Doubtful Accounts Receivable			$ 3,400,000		$ 2,700,000
Cash and Cash Equivalents, at Carrying Value			8,466,000	15,381,000	8,416,000					33,624,000																		5,700,000
Deferred Finance Costs, Gross			402,000																										7,800,000	445,000			12,000	6,700,000
Line of Credit Facility, Increase (Decrease), Other, Net	55,000,000	(37,500,000)
Line of Credit Facility, Maximum Borrowing Capacity	300,000,000	262,500,000						262,500,000	245,000,000		180,000,000
Payments of Debt Extinguishment Costs		621,000
Proceeds from Unsecured Notes Payable					250,000,000
Debt Instrument, Interest Rate, Stated Percentage					9.00%	9.00%	9.00%
Interest Expense			514,000	406,000
Deferred Revenue			2,500,000		2,600,000
Deferred Costs, Current			1,700,000		1,600,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)																	9,900,000	6,900,000	83,000	68,000	135,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)			2,314,976
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)			$ 4.23
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value (in Dollars per share)			$ 9,800,000
Share-based Compensation			4,696,000	977,000										149,000	99,000										2,200,000	3,000,000	744,000				878,000	1,600,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized												28,400,000		211,000		360,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition												1 year 10 months		5 months	8 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value			17,679,000										43,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in Shares)														2,000
Remaining To Be Issued Upon Vesting Shares (in Shares)														9,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			$ 356,000																			$ 249,000	$ 111,000	$ 4,000