The Company And Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Apr. 30, 2014 segment	Apr. 30, 2013	Apr. 30, 2012
The Company And Summary Of Significant Accounting Policies [Line Items]
Number of reportable segments	2
Gain (loss) on foreign currency transactions	$ 14,000	$ (200,000)	$ (80,000)
Disclosure of major customers	. For the year ended April 30, 2014, we had one client that accounted for 17% of consolidated revenues and constituted 19% of consolidated accounts receivable at April 30, 2014. For the year ended April 30, 2013, the same client accounted for 21% of consolidated revenues and constituted 27% of consolidated accounts receivable at April 30, 2013. For the year ended April 30, 2012, the same client accounted for 23% of consolidated revenues and constituted 24% of consolidated accounts receivable at April 30, 2012.
Capitalized software costs	0
Goodwill	11,706,000	11,706,000
Software revenue recognition, fee recognition period	1 year
Deferred revenue	8,590,000	8,449,000
Limited warranty for product and services, period	90 days
Share vesting period, years	4 years
Reserves for uncertain tax positions	0
Accrued interest or penalties associated with unrecognized tax benefits	0
Interest expense associated with unrecognized tax benefits	0
Sales [Member] | International [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	47.00%	32.00%	32.00%
One Client [Member] | Accounts Receivable [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	19.00%	27.00%	24.00%
One Client [Member] | Sales [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Concentration risk percentage	17.00%	21.00%	23.00%
Software Service, Support and Maintenance Arrangement [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Deferred revenue	1,200,000	3,500,000
eDiscovery [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Impairments of goodwill			13,500,000
Percentage of impairment to carrying value of goodwill			69.00%
Impairments of finite-lived intangible assets			1,500,000
eDiscovery [Member] | Trademarks [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Impairments of finite-lived intangible assets			200,000
eDiscovery [Member] | Technology-Based [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Impairments of finite-lived intangible assets			1,200,000
eDiscovery [Member] | Noncompete Agreements [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Impairments of finite-lived intangible assets			100,000
Archive And eDiscovery [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Goodwill	6,100,000	6,100,000
Development, Database, and Migration Tools [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Goodwill	$ 5,600,000	$ 5,600,000
Maximum [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Useful life	7 years
Minimum [Member]
The Company And Summary Of Significant Accounting Policies [Line Items]
Useful life	3 years