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Note 7 - Stock-based Compensation (Tables)

9 Months Ended

Dec. 31, 2017

Notes Tables

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

		Three Months E nded December 3 1 ,								Nine Months E nded December 3 1 ,
		201 7				201 6				201 7				201 6
Total cost of stock-based compensation charged against ( loss) income before income taxes		$	438			$	380			$	1,423			$	1,221
Amount of income tax (expense) benefit recognized in earnings			(99	)			328				893				1,027
Amount charged against net (loss) income		$	537			$	52			$	530			$	194
Impact on net (loss) income per common share:
Basic		$	0.14			$	0.01			$	0.14			$	0.05
Diluted			0.14				0.01			$	0.14				0.05

Share-based Compensation, Stock Options, Activity [Table Text Block]

		Number of Shares				Weighted- A verage Exercise Price per Share				Weighted- A verage Remaining Contractual Term				Aggregate Intrinsic Value (000s)
Outstanding at March 31, 2017			510,361			$	75.78				5.0			$	23,956
Stock o ptions granted			95,605				123.09				5.3
Stock o ptions forfeited			(52,833	)			95.29				4.8
Stock o ptions expired			(964	)			79.87				3.1
Stock o ptions exercised			(51,496	)			61.27				--
Outstanding at December 31, 2017			500,673				84.24				4.5			$	20,092

Exercisable at December 31, 2017			164,475				60.13				3.8			$	10,554

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

		Number of Shares				Weighted- A verage Grant-Date Fair Value
Unvested at March 31, 201 7			373,766			$	22.49
Stock o ptions granted			95,605				39.00
Stock o ptions forfeited			(52,833	)			27.42
Stock o ptions vested			(80,340	)			20.85
Unvested at December 31, 2017			336,198				28.47