Note 1 - Basis of Presentation and Recent Accounting Pronouncements - Effects of Adopting Topic 606 (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017	Feb. 01, 2018	Jan. 31, 2018	Jan. 31, 2017
Cash and Cash Equivalents, at Carrying Value, Ending Balance		$ 139,528	$ 149,202	$ 139,528	$ 149,202	$ 147,023	$ 147,023	$ 145,082
Accounts receivable, net		54,258		54,258		83,518	83,518
Other current assets		21,116		21,116		19,869	15,856
Total current assets		214,902		214,902		250,410	246,397
Property and equipment, net		29,741		29,741		30,408	30,408
Capitalized software costs, net		1,405		1,405		990	990
Goodwill		11,095		11,095		11,023	11,023
Deferred tax assets, net						15,885	7,944
Other assets, net		10,931		10,931		11,476	3,055
Total assets		279,943		279,943		320,192	299,817
Current portion of long-term debt		476		476		466	466
Accounts payable		10,962		10,962		14,818	14,818
Deferred revenue		91,195		91,195		115,454	116,693
Other current liabilities		35,702		35,702		43,460	43,460
Total current liabilities		138,335		138,335		174,198	175,437
Long-term debt		13,075		13,075		13,313	13,313
Other liabilities		4,943		4,943		4,928	5,439
Additional paid-in capital		192,421		192,421		200,456	200,456
Treasury stock		(7,532)		(7,532)		(12,461)	(12,461)
Retained Earnings (Accumulated Deficit), Ending Balance		(53,655)		(53,655)		(53,434)	(75,559)
Accumulated other comprehensive loss		(7,664)		(7,664)		(6,828)	(6,828)
Total stockholders’ equity		123,590		123,590		127,753	105,628
Total liabilities and stockholders’ equity		279,943		279,943		320,192	299,817
Cash and equivalents		139,528	149,202	139,528	149,202	147,023	147,023	$ 145,082
Accounts receivable, net		54,258		54,258		83,518	83,518
Other current assets		21,116		21,116		19,869	15,856
Total current assets		214,902		214,902		250,410	246,397
Property and equipment, net		29,741		29,741		30,408	30,408
Capitalized software costs, net		1,405		1,405		990	990
Goodwill		11,095		11,095		11,023	11,023
Deferred tax assets, net		11,869		11,869			7,944
Other assets, net		10,931		10,931		11,476	3,055
Total assets		279,943		279,943		320,192	299,817
Current portion of long-term debt		476		476		466	466
Accounts payable		10,962		10,962		14,818	14,818
Deferred revenue		91,195		91,195		115,454	116,693
Other current liabilities		35,702		35,702		43,460	43,460
Total current liabilities		138,335		138,335		174,198	175,437
Long-term debt		13,075		13,075		13,313	13,313
Other liabilities		4,943		4,943		4,928	5,439
Additional paid-in capital		192,421		192,421		200,456	200,456
Accumulated deficit		(53,655)		(53,655)		(53,434)	(75,559)
Accumulated other comprehensive loss		(7,664)		(7,664)		(6,828)	(6,828)
Total stockholders’ equity		123,590		123,590		127,753	105,628
Total liabilities and stockholders’ equity		279,943		279,943		320,192	299,817
Revenues		84,543	75,958	170,733	147,340
Costs of revenues		40,436	36,694	81,503	71,560
Gross profit		44,107	39,264	89,230	75,780
Sales and marketing		19,502	17,697	39,448	35,284
Research and development		13,513	11,689	27,519	23,221
General and administrative		9,366	9,224	18,728	17,817
Total operating expenses		42,381	38,721	85,695	76,596
Operating income		1,726	543	3,535	(816)
Interest income		(743)	(493)	(1,267)	(661)
Interest expense		154	157	311	313
Other (income) expense, net		(269)	1,208	(673)	1,812
Total other income, net		(858)	872	(1,629)	1,464
Income before income taxes		2,584	(329)	5,164	(2,280)
Income tax expense		1,471	832	2,654	1,452
Net income		1,113	(1,161)	2,510	(3,732)
Net income (loss)		1,113	(1,161)	2,510	(3,732)
Amortization of costs capitalized to obtain and fulfill contracts				2,051
Net change in valuation allowance				4,553	2,957
Costs capitalized to obtain and fulfill contracts				(1,692)
Other assets				(894)	1,147
Deferred revenue				(21,683)	(17,987)
Net cash provided by operating activities				9,146	7,638
Effect of exchange rates on cash and equivalents				(2,110)	4,211
Common Class A [Member]
Common stock value		16		16		16	16
Common stock - Class A		16		16		16	16
Net income		$ 954	$ (994)	$ 2,150	$ (3,193)
Basic income per share (in dollars per share)		$ 0.06	$ (0.06)	$ 0.13	$ (0.20)
Diluted income per share (in dollars per share)		$ 0.05	$ (0.06)	$ 0.12	$ (0.20)
Net income (loss)		$ 954	$ (994)	$ 2,150	$ (3,193)
Common Class B [Member]
Common stock value		4		4		4	4
Common stock - Class A		4		4		4	4
Net income		$ 159	$ (167)	$ 360	$ (539)
Basic income per share (in dollars per share)		$ 0.05	$ (0.05)	$ 0.11	$ (0.17)
Diluted income per share (in dollars per share)		$ 0.05	$ (0.05)	$ 0.11	$ (0.17)
Net income (loss)		$ 159	$ (167)	$ 360	$ (539)
Subscription and Circulation [Member]
Deferred revenue		27,821		27,821			31,034
Deferred revenue		27,821		27,821			31,034
Revenues		22,439	17,420	43,950	32,763
Costs of revenues		8,334	7,428	16,562	15,148
License [Member]
Deferred revenue		96		96			756
Deferred revenue		96		96			756
Revenues		5,561	6,743	11,827	12,008
Costs of revenues		574	828	1,238	1,513
Maintenance [Member]
Deferred revenue		61,650		61,650			80,811
Deferred revenue		61,650		61,650			80,811
Revenues		30,574	31,971	62,057	63,877
Costs of revenues		7,774	7,840	15,639	15,534
Professional Services [Member]
Deferred revenue		1,589		1,589			3,523
Deferred revenue		1,589		1,589			$ 3,523
Revenues		25,969	19,824	52,899	38,692
Costs of revenues		23,754	$ 20,598	48,064	$ 39,365
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Cash and Cash Equivalents, at Carrying Value, Ending Balance		139,528		139,528
Accounts receivable, net		54,258		54,258
Other current assets		16,922		16,922
Total current assets		210,708		210,708
Property and equipment, net		29,741		29,741
Capitalized software costs, net		1,405		1,405
Goodwill		11,095		11,095
Other assets, net		3,234		3,234
Total assets		269,099		269,099
Current portion of long-term debt		476		476
Accounts payable		10,962		10,962
Deferred revenue		94,229		94,229
Other current liabilities		35,702		35,702
Total current liabilities		141,369		141,369
Long-term debt		13,075		13,075
Other liabilities		5,811		5,811
Additional paid-in capital		192,421		192,421
Treasury stock		(7,532)		(7,532)
Retained Earnings (Accumulated Deficit), Ending Balance		(68,405)		(68,405)
Accumulated other comprehensive loss		(7,660)		(7,660)
Total stockholders’ equity		108,844		108,844
Total liabilities and stockholders’ equity		269,099		269,099
Cash and equivalents		139,528		139,528
Accounts receivable, net		54,258		54,258
Other current assets		16,922		16,922
Total current assets		210,708		210,708
Property and equipment, net		29,741		29,741
Capitalized software costs, net		1,405		1,405
Goodwill		11,095		11,095
Deferred tax assets, net		12,916		12,916
Other assets, net		3,234		3,234
Total assets		269,099		269,099
Current portion of long-term debt		476		476
Accounts payable		10,962		10,962
Deferred revenue		94,229		94,229
Other current liabilities		35,702		35,702
Total current liabilities		141,369		141,369
Long-term debt		13,075		13,075
Other liabilities		5,811		5,811
Additional paid-in capital		192,421		192,421
Accumulated deficit		(68,405)		(68,405)
Accumulated other comprehensive loss		(7,660)		(7,660)
Total stockholders’ equity		108,844		108,844
Total liabilities and stockholders’ equity		269,099		269,099
Revenues		85,020		168,057
Costs of revenues		40,440		81,517
Gross profit		44,580		86,540
Sales and marketing		19,480		39,164
Research and development		13,454		27,401
General and administrative		9,366		18,728
Total operating expenses		42,300		85,293
Operating income		2,280		1,247
Interest income		(743)		(1,267)
Interest expense		154		311
Other (income) expense, net		(269)		(673)
Total other income, net		(858)		(1,629)
Income before income taxes		3,138		2,876
Income tax expense		1,583		2,575
Net income		1,555		301
Net income (loss)		1,555		301
Amortization of costs capitalized to obtain and fulfill contracts				415
Net change in valuation allowance				5,201
Costs capitalized to obtain and fulfill contracts				(326)
Other assets				(1,219)
Deferred revenue				(19,531)
Net cash provided by operating activities				9,142
Effect of exchange rates on cash and equivalents				(2,106)
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Common Class A [Member]
Common stock value		16		16
Common stock - Class A		$ 16		$ 16
Basic income per share (in dollars per share)		$ 0.08		$ 0.01
Diluted income per share (in dollars per share)		$ 0.07		$ 0.01
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Common Class B [Member]
Common stock value		$ 4		$ 4
Common stock - Class A		$ 4		$ 4
Basic income per share (in dollars per share)		$ 0.07		$ 0.01
Diluted income per share (in dollars per share)		$ 0.07		$ 0.01
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Subscription and Circulation [Member]
Revenues		$ 22,188		$ 43,393
Costs of revenues		8,338		16,576
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | License [Member]
Revenues		5,345		10,441
Costs of revenues		574		1,238
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Maintenance [Member]
Revenues		30,614		62,170
Costs of revenues		7,774		15,639
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Professional Services [Member]
Revenues		26,873		52,053
Costs of revenues		23,754		48,064
Accounting Standards Update 2014-09 [Member]
Cash and Cash Equivalents, at Carrying Value, Ending Balance
Accounts receivable, net
Other current assets						4,013
Total current assets						4,013
Property and equipment, net
Capitalized software costs, net
Goodwill
Deferred tax assets, net						(1,643)
Other assets, net						8,421
Total assets						10,791
Current portion of long-term debt
Accounts payable
Deferred revenue						(1,239)
Other current liabilities
Total current liabilities						(1,239)
Long-term debt
Other liabilities						(511)
Additional paid-in capital
Treasury stock
Retained Earnings (Accumulated Deficit), Ending Balance						12,541
Accumulated other comprehensive loss
Total stockholders’ equity						12,541
Total liabilities and stockholders’ equity						10,791
Cash and equivalents
Accounts receivable, net
Other current assets						4,013
Total current assets						4,013
Property and equipment, net
Capitalized software costs, net
Goodwill
Other assets, net						8,421
Total assets						10,791
Current portion of long-term debt
Accounts payable
Deferred revenue						(1,239)
Other current liabilities
Total current liabilities						(1,239)
Long-term debt
Other liabilities						(511)
Additional paid-in capital
Accumulated deficit						12,541
Accumulated other comprehensive loss
Total stockholders’ equity						12,541
Total liabilities and stockholders’ equity						10,791
Accounting Standards Update 2014-09 [Member] | Common Class A [Member]
Common stock value
Common stock - Class A
Accounting Standards Update 2014-09 [Member] | Common Class B [Member]
Common stock value
Common stock - Class A
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Cash and Cash Equivalents, at Carrying Value, Ending Balance
Accounts receivable, net
Other current assets		(4,194)		(4,194)
Total current assets		(4,194)		(4,194)
Property and equipment, net
Capitalized software costs, net
Goodwill
Other assets, net		(7,697)		(7,697)
Total assets		(10,844)		(10,844)
Current portion of long-term debt
Accounts payable
Deferred revenue		3,034		3,034
Other current liabilities
Total current liabilities		3,034		3,034
Long-term debt
Other liabilities		868		868
Additional paid-in capital
Treasury stock
Retained Earnings (Accumulated Deficit), Ending Balance		(14,750)		(14,750)
Accumulated other comprehensive loss		4		4
Total stockholders’ equity		(14,746)		(14,746)
Total liabilities and stockholders’ equity		(10,844)		(10,844)
Cash and equivalents
Accounts receivable, net
Other current assets		(4,194)		(4,194)
Total current assets		(4,194)		(4,194)
Property and equipment, net
Capitalized software costs, net
Goodwill
Deferred tax assets, net		1,047		1,047
Other assets, net		(7,697)		(7,697)
Total assets		(10,844)		(10,844)
Current portion of long-term debt
Accounts payable
Deferred revenue		3,034		3,034
Other current liabilities
Total current liabilities		3,034		3,034
Long-term debt
Other liabilities		868		868
Additional paid-in capital
Accumulated deficit		(14,750)		(14,750)
Accumulated other comprehensive loss		4		4
Total stockholders’ equity		(14,746)		(14,746)
Total liabilities and stockholders’ equity		(10,844)		(10,844)
Revenues		477		(2,676)
Costs of revenues		4		14
Gross profit		473		(2,690)
Sales and marketing		(22)		(284)
Research and development		(59)		(118)
General and administrative
Total operating expenses		(81)		(402)
Operating income		554		(2,288)
Interest income
Interest expense
Other (income) expense, net
Total other income, net
Income before income taxes		554		(2,288)
Income tax expense		112		(79)
Net income		442		(2,209)
Net income (loss)		442		(2,209)
Amortization of costs capitalized to obtain and fulfill contracts				(1,636)
Net change in valuation allowance				648
Costs capitalized to obtain and fulfill contracts				1,366
Other assets				(325)
Deferred revenue				2,152
Net cash provided by operating activities				(4)
Effect of exchange rates on cash and equivalents				4
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Common Class A [Member]
Common stock value
Common stock - Class A
Basic income per share (in dollars per share)		$ 0.02		$ (0.12)
Diluted income per share (in dollars per share)		$ 0.02		$ (0.11)
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Common Class B [Member]
Common stock value
Common stock - Class A
Basic income per share (in dollars per share)		$ 0.02		$ (0.10)
Diluted income per share (in dollars per share)		$ 0.02		$ (0.10)
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Subscription and Circulation [Member]
Revenues		$ (251)		$ (557)
Costs of revenues		4		14
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | License [Member]
Revenues		(216)		(1,386)
Costs of revenues
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Maintenance [Member]
Revenues		40		113
Costs of revenues
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Professional Services [Member]
Revenues		904		(846)
Costs of revenues
Accounting Standards Update 2016-16 [Member]
Cash and Cash Equivalents, at Carrying Value, Ending Balance	[1]
Accounts receivable, net	[1]
Other current assets	[1]
Total current assets	[1]
Property and equipment, net	[1]
Capitalized software costs, net	[1]
Goodwill	[1]
Deferred tax assets, net	[1]					9,584
Other assets, net	[1]
Total assets	[1]					9,584
Current portion of long-term debt	[1]
Accounts payable	[1]
Deferred revenue	[1]
Other current liabilities	[1]
Total current liabilities	[1]
Long-term debt	[1]
Other liabilities	[1]
Additional paid-in capital	[1]
Treasury stock	[1]
Retained Earnings (Accumulated Deficit), Ending Balance						9,584
Accumulated other comprehensive loss	[1]
Total stockholders’ equity	[1]					9,584
Total liabilities and stockholders’ equity	[1]					9,584
Cash and equivalents	[1]
Accounts receivable, net	[1]
Other current assets	[1]
Total current assets	[1]
Property and equipment, net	[1]
Capitalized software costs, net	[1]
Goodwill	[1]
Other assets, net	[1]
Total assets	[1]					9,584
Current portion of long-term debt	[1]
Accounts payable	[1]
Deferred revenue	[1]
Other current liabilities	[1]
Total current liabilities	[1]
Long-term debt	[1]
Other liabilities	[1]
Additional paid-in capital	[1]
Accumulated deficit						9,584
Accumulated other comprehensive loss	[1]
Total stockholders’ equity	[1]					9,584
Total liabilities and stockholders’ equity	[1]					9,584
Accounting Standards Update 2016-16 [Member] | Common Class A [Member]
Common stock value	[1]
Common stock - Class A	[1]
Accounting Standards Update 2016-16 [Member] | Common Class B [Member]
Common stock value	[1]
Common stock - Class A	[1]

[1] For further information about the adoption of Income taxes (Topic 740): Intra-entity Transfers of Assets Other Than Inventory see Note 10 "Income Taxes."