Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 30, 2018	Apr. 30, 2017
Current assets:
Cash and cash equivalents	$ 52,794	$ 66,001
Investments	26,121	19,332
Trade accounts receivable, less allowance for doubtful accounts of $159 at April 30, 2018 and $171 at April 30, 2017:
Billed	18,643	17,060
Unbilled	3,375	2,811
Prepaid expenses and other current assets	6,592	4,322
Total current assets	107,525	109,526
Investments-noncurrent	8,893	4,455
Property and equipment, net	3,034	2,055
Capitalized software, net	9,728	8,614
Goodwill	25,888	19,549
Other intangibles, net	5,120	3,399
Other assets	2,777	1,176
Total assets	162,965	148,774
Current liabilities:
Accounts payable	1,974	1,541
Accrued compensation and related costs	6,310	3,329
Dividends payable	3,367	3,259
Other current liabilities	1,246	5,171
Deferred revenue	33,226	29,437
Total current liabilities	46,123	42,737
Deferred income taxes	2,615	1,994
Long-term deferred revenue	147	214
Other long-term liabilities	1,496	79
Total liabilities	50,381	45,024
Shareholders' equity:
Additional paid-in capital	131,258	121,280
Retained earnings	3,366	4,608
Class A treasury stock, 4,588,632 shares at April 30, 2018 and 4,588,632 shares at April 30, 2017, at cost	(25,559)	(25,559)
Total shareholders' equity	112,584	103,750
Commitments and contingencies
Total liabilities and shareholders' equity	162,965	148,774
Class A Common Shares
Shareholders' equity:
Common stock value	3,314	3,182
Class B Common Shares
Shareholders' equity:
Common stock value	$ 205	$ 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.