Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2017	Apr. 30, 2016
Current assets:
Cash and cash equivalents	$ 55,752	$ 49,004
Investments	20,804	20,957
Trade accounts receivable, less allowance for doubtful accounts of $151 at January 31, 2017 and $178 at April 30, 2016:
Billed	14,980	17,104
Unbilled	2,415	3,444
Prepaid expenses and other current assets	4,394	3,586
Total current assets	98,345	94,095
Investments-Noncurrent	2,715	7,924
Property and equipment, net of accumulated depreciation of $33,029 at January 31, 2017 and $32,437 at April 30, 2016	3,321	3,396
Capitalized software, net of accumulated amortization of $19,460 at January 31, 2017 and $16,173 at April 30, 2016	8,324	9,140
Goodwill	19,549	18,749
Other intangibles, net of accumulated amortization of $5,913 at January 31, 2017 and $4,747 at April 30, 2016	3,893	1,858
Other assets	826	1,562
Total assets	136,973	136,724
Current liabilities:
Accounts payable	1,263	1,280
Accrued compensation and related costs	2,600	4,349
Dividends payable	3,261	2,887
Other current liabilities	4,948	2,779
Deferred revenue	28,406	27,999
Total current liabilities	40,478	39,294
Deferred income taxes	1,039	1,319
Long-term deferred revenue	313	612
Other long-term liabilities	70	605
Total liabilities	41,900	41,830
Shareholders' equity:
Additional paid-in capital	119,659	114,210
Retained (accumulated deficit)/earnings	(2,432)	2,897
Class A treasury stock, 4,588,632 shares at January 31, 2017 and April 30, 2016, at cost	(25,559)	(25,559)
Total shareholders' equity	95,073	94,894
Commitments and contingencies
Total liabilities and shareholders' equity	136,973	136,724
Class A Common Shares
Shareholders' equity:
Common stock value	3,162	3,097
Class B Common Shares
Shareholders' equity:
Common stock value	$ 243	$ 249

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.