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Note 17 - Stock-based Compensation Plans (Tables)

12 Months Ended

Jan. 31, 2020

Notes Tables

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

Year Ended			January 31,				January 31,				January 31,
			2020				2019				2018
Cost of revenues			220				160				90
Sales and marketing			706				436				246
Research and development			281				184				85
General and administrative			3,702				2,930				2,386
Effect on net income			4,909				3,710				2,807

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Year Ended			January 31, 2020				January 31, 2019				January 31, 2018
Expected dividend yield (%)			–				–				–
Expected volatility (%)			23.5				23.6				23.5
Risk-free rate (%)			1.4				2.0				1.0
Expected option life (years)			5				5				5

Share-based Payment Arrangement, Option, Activity [Table Text Block]

			Number of Stock Options Outstanding				Weighted- Average Exercise Price				Weighted- Average Remaining Contractual Life (years)				Aggregate Intrinsic Value (in millions)
Balance at January 31, 2018			657,209			$	18.21				4.9				5.7
Granted			272,144			$	27.96
Exercised			(46,065	)		$	11.75
Forfeited			(3,950	)		$	26.43
Balance at January 31, 2019			879,338			$	21.41				4.7				8.7
Granted			367,173			$	38.06
Exercised			(94,970	)		$	15.62
Forfeited			(23,719	)		$	31.93
Balance at January 31, 2020			1,127,822			$	26.82				4.6				20.2
Vested or expected to vest at January 31, 2020			1,127,822			$	26.82				4.6				20.2
Exercisable at January 31, 2020			718,169			$	22.88				4.0				15.7

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

		Options Outstanding												Options Exercisable
Range of Exercise Prices			Weighted Average Exercise Price				Number of Stock Options				Weighted Average Remaining Contractual Life (years)				Weighted Average Exercise Price				Number of Stock Options
$11.43 – $11.59		$	11.57				126,500				1.4			$	11.57				126,500
$18.71 – $22.57		$	21.17				397,014				3.8			$	21.08				357,014
$25.91 – $27.50		$	27.49				247,935				5.2			$	27.49				140,461
$38.04 – $39.70		$	38.07				356,373				6.2			$	38.06				94,194
		$	26.82				1,127,822				4.6			$	22.88				718,169

Schedule of Nonvested Share Activity [Table Text Block]

			Number of Stock Options Outstanding				Weighted-Average Grant-Date Fair Value per Share
Balance at January 31, 2018			276,067			$	4.98
Granted			272,144			$	7.10
Vested			(219,043	)		$	5.56
Forfeited			(3,950	)		$	6.41
Balance at January 31, 2019			325,218			$	6.18
Granted			367,173			$	8.99
Vested			(259,269	)		$	6.96
Forfeited			(23,469	)		$	7.69
Balance at January 31, 2020			409,653			$	8.03

Share-based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block]

			Number of PSUs Outstanding				Weighted- Average Granted Date Fair Value				Weighted- Average Remaining Contractual Life (years)				Aggregate Intrinsic Value (in millions)
Balance at January 31, 2018			440,520			$	15.91				6.1				11.9
Granted			54,351			$	35.23
Performance units issued			35,512			$	19.59
Balance at January 31, 2019			530,383			$	18.02				5.5				16.6
Granted			53,729			$	53.65
Performance units issued			45,762			$	23.24
Balance at January 31, 2020			629,874			$	21.19				5.0				28.2
Vested or expected to vest at January 31, 2020			629,874			$	21.19				5.0				28.2
Exercisable at January 31, 2020			521,794			$	16.45				4.3				23.4

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

			Number of RSUs Outstanding				Weighted- Average Granted Date Fair Value				Weighted- Average Remaining Contractual Life (years)				Aggregate Intrinsic Value (in millions)
Balance at January 31, 2018			299,020			$	12.80				6.1				8.1
Granted			38,046			$	27.96
Balance at January 31, 2019			337,066			$	14.42				5.6				10.6
Granted			37,611			$	38.04
Balance at January 31, 2020			374,677			$	16.57				5.0				16.8
Vested or expected to vest at January 31, 2020			374,677			$	16.57				5.0				16.8
Exercisable at January 31, 2020			336,921			$	14.56				4.6				15.1

Schedule Of Cash Settled Restricted Share Unit Plan Activity [Table Text Block]

			Number of CRSUs Outstanding				Weighted- Average Remaining Contractual Life (years)
Balance at January 31, 2018			58,171				1.5
Granted			32,261
Vested and settled in cash			(45,369	)
Balance at January 31, 2019			45,063				1.6
Granted			30,086
Vested and settled in cash			(32,422	)
Balance at January 31, 2020			42,727				1.6
Non-vested at January 31, 2020			42,727				1.6

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