Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 31, 2018	May 01, 2018	Apr. 30, 2018	Jul. 31, 2017	Apr. 30, 2017
Current assets:
Cash and cash equivalents	$ 54,855	$ 52,794	$ 52,794	$ 66,227	$ 66,001
Investments	29,992	26,121	26,121
Trade accounts receivable, less allowance for doubtful accounts of $161 at July 31, 2018 and $159 at April 30, 2018:
Billed	13,683	18,643	18,643
Unbilled	3,311	3,815	3,375
Prepaid expenses and other current assets	6,433	6,718	6,592
Total current assets	108,274	108,091	107,525
Investments-noncurrent	2,509	8,893	8,893
Property and equipment, net of accumulated depreciation of $28,792 at July 31, 2018 and $28,644 at April 30, 2018	3,600	3,034	3,034
Capitalized software, net of accumulated amortization of $25,166 at July 31, 2018 and $24,113 at April 30, 2018	9,559	9,728	9,728
Goodwill	25,888	25,888	25,888
Other intangibles, net of accumulated amortization of $8,852 at July 31, 2018 and $8,255 at April 30, 2018	4,523	5,120	5,120
Other assets	4,055	4,102	2,777
Total assets	158,408	164,856	162,965
Current liabilities:
Accounts payable	2,166	1,974	1,974
Accrued compensation and related costs	2,305	6,310	6,310
Dividends payable	3,400	3,367	3,367
Other current liabilities	925	1,326	1,246
Deferred revenue	29,518	32,705	33,226
Total current liabilities	38,314	45,682	46,123
Deferred income taxes	3,222	3,194	2,615
Long-term deferred revenue		147	147
Other long-term liabilities	1,485	1,496	1,496
Total liabilities	43,021	50,519	50,381
Shareholders' equity:
Additional paid-in capital	134,292	131,258	131,258
Retained earnings	3,105	5,119	3,366
Class A treasury stock, 4,588,632 shares at July 31, 2018 and April 30, 2018, at cost	(25,559)	(25,559)	(25,559)
Total shareholders' equity	115,387	114,337	112,584
Commitments and contingencies
Total liabilities and shareholders' equity	158,408	164,856	162,965
Class A Common Shares
Shareholders' equity:
Common stock value	3,367	3,314	3,314
Class B Common Shares
Shareholders' equity:
Common stock value	$ 182	$ 205	$ 205