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Note 16 - Stock-based Compensation Plans (Tables)

12 Months Ended

Jan. 31, 2018

Notes Tables

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

			January 31, 2018				January 31, 2017				January 31, 2016
Cost of revenues			90				40				24
Sales and marketing			246				81				41
Research and development			85				14				-
General and administrative			2,386				1,887				1,512
Effect on net income			2,807				2,022				1,577

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

Year Ended			January 31, 2018				January 31, 2017				January 31, 2016
Expected dividend yield (%)			-				-				N/A
Expected volatility (%)			23.5				25.2				N/A
Risk-free rate (%)			1.0				0.6				N/A
Expected option life (years)			5				5				N/A

Share-based Compensation, Stock Options, 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, 2016			468,889			$	8.25				3.5				5.2
Granted			170,932			$	19.06
Exercised			(113,500	)		$	4.93
Balance at January 31, 2017			526,321			$	12.36				4.2				4.9
Granted			274,500			$	23.18
Exercised			(142,112	)		$	6.98
Forfeited			(1,500	)		$	23.14
Balance at January 31, 2018			657,209			$	18.21				4.9				5.7
Vested or expected to vest at January 31, 2018			657,209			$	18.21				4.9				5.7
Exercisable at January 31, 2018			328,642			$	16.25				4.4				3.5

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by 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
$4.89	–	$6.93		$	6.31				38,777				1.1			$	6.31				38,777
$11.73	–	$11.89		$	11.87				174,500				3.4			$	11.88				108,000
$19.19	–	$20.86		$	19.43				170,932				5.3			$	19.27				102,285
$23.14	–	$26.57		$	23.17				273,000				6.2			$	23.14				79,580
				$	18.21				657,209				4.9			$	16.25				328,642

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, 2016			53,578			$	2.52
Granted			170,932			$	4.46
Vested			(72,218	)		$	3.70
Balance at January 31, 2017			152,292			$	4.12
Granted			274,500			$	5.26
Vested			(149,225	)		$	4.70
Forfeited			(1,500	)		$	5.25
Balance at January 31, 2018			276,067			$	4.98

Share-based Compensation, Performance Shares Award 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, 2016			253,537			$	12.39				7.2				4.9
Granted			54,480			$	23.37
Performance units issued			29,630			$	9.26
Balance at January 31, 2017			337,647			$	13.73				6.6				7.3
Granted			51,121			$	30.13
Performance units issued			51,752			$	14.37
Balance at January 31, 2018			440,520			$	15.91				6.1				11.9
Vested or expected to vest at January 31, 2018			440,520			$	15.91				6.1				11.9
Exercisable at January 31, 2018			334,919			$	12.46				5.3				9.0

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units 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, 2016			224,779			$	10.03				7.4				4.3
Granted			38,456			$	18.81
Balance at January 31, 2017			263,235			$	11.17				6.7				5.7
Granted			35,785			$	23.14
Balance at January 31, 2018			299,020			$	12.80				6.1				8.1
Vested or expected to vest at January 31, 2018			299,020			$	12.80				6.1				8.1
Exercisable at January 31, 2018			262,345			$	11.55				5.8				7.1

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, 2016			100,749				1.6
Granted			43,218
Vested and settled in cash			(66,638	)
Balance at January 31, 2017			77,329				1.4
Granted			32,978
Vested and settled in cash			(50,802	)
Forfeited			(1,334	)
Balance at January 31, 2018			58,171				1.5
Non-vested at January 31, 2018			51,651				1.5

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