Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense - Performance Shares [Member] - USD ($)		3 Months Ended	9 Months Ended
		Dec. 31, 2015	May. 31, 2015
Share-based Compensation Award, Tranche One [Member]
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]
Cumulative Catch-up Adjustment	[1]		$ 0
Remaining Expense to be Recognized			697,000
Share-based Compensation Award, Tranche Two [Member]
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]
Cumulative Catch-up Adjustment	[1]		1,120,000
Remaining Expense to be Recognized			1,177,000
Share-based Compensation Award, Tranche Three [Member]
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]
Cumulative Catch-up Adjustment	[1]		2,594,000
Remaining Expense to be Recognized			1,303,000
Code Red, Inc. [Member]
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]
Cumulative Catch-up Adjustment		$ 1.00	281,000	[1]
Remaining Expense to be Recognized			5,531,000
Code Red, Inc. [Member] | Share-based Compensation Award, Tranche One [Member]
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]
Cumulative Catch-up Adjustment		0.10	(150,000)	[1]
Remaining Expense to be Recognized			0
Code Red, Inc. [Member] | Share-based Compensation Award, Tranche Two [Member]
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]
Cumulative Catch-up Adjustment	[1]		0
Remaining Expense to be Recognized			2,213,000
Code Red, Inc. [Member] | Share-based Compensation Award, Tranche Three [Member]
Note 13 - Employee Stock Option and Retirement Plans (Details) - Changes to the Current Estimate of the Vesting Percentage and Related Expense [Line Items]
Cumulative Catch-up Adjustment		$ 0.70	141,000	[1]
Remaining Expense to be Recognized			$ 3,872,000

[1] Amounts represent the cumulative catch-up adjustment to be recorded if there was a change in the vesting percentage as of May 31, 2015.