Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 31, 2017	Apr. 30, 2017
Current assets:
Cash and cash equivalents	$ 66,227	$ 66,001
Investments	17,979	19,332
Trade accounts receivable, less allowance for doubtful accounts of $186 at July 31, 2017 and $171 at April 30, 2017:
Billed	13,990	17,060
Unbilled	2,377	2,811
Prepaid expenses and other current assets	3,900	4,322
Total current assets	104,473	109,526
Investments-Noncurrent	6,352	4,455
Property and equipment, net of accumulated depreciation of $28,273 at July 31, 2017 and $28,153 at April 30, 2017	2,069	2,055
Capitalized software, net of accumulated amortization of $21,293 at July 31, 2017 and $20,423 at April 30, 2017	9,052	8,614
Goodwill	19,549	19,549
Other intangibles, net of accumulated amortization of $6,801 at July 31, 2017 and $6,406 at April 30, 2017	3,004	3,399
Other assets	1,343	1,176
Total assets	145,842	148,774
Current liabilities:
Accounts payable	1,829	1,541
Accrued compensation and related costs	3,095	3,329
Dividends payable	3,270	3,259
Other current liabilities	2,471	5,171
Deferred revenue	28,332	29,437
Total current liabilities	38,997	42,737
Deferred income taxes	2,114	1,994
Long-term deferred revenue	240	214
Other long-term liabilities	77	79
Total liabilities	41,428	45,024
Shareholders' equity:
Additional paid-in capital	122,477	121,280
Retained earnings	4,064	4,608
Class A treasury stock, 4,588,632 shares at July 31, 2017 and April 30, 2017, at cost	(25,559)	(25,559)
Total shareholders' equity	104,414	103,750
Commitments and contingencies
Total liabilities and shareholders' equity	145,842	148,774
Class A Common Shares
Shareholders' equity:
Common stock value	3,199	3,182
Class B Common Shares
Shareholders' equity:
Common stock value	$ 233	$ 239

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.