Goodwill and Other Intangible Assets (Tables)

6 Months Ended

Jul. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

	Weighted Average Life at 7/31/2018	July 31, 2018										January 31, 2018
		Gross Carrying Amount		Accumulated Amortization			Impairment			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Impairment			Net Carrying Amount
				(in thousands)										(in thousands)
Goodwill		$	7,060	$	—		$	(4,529	)	$	2,531	$	7,060	$	—		$	(4,529	)	$	2,531
Proprietary rights	7.9	$	9,286	$	(3,915	)	$	—		$	5,371	$	6,181	$	(3,663	)	$	—		$	2,518
Customer relationships	3.3	5,024		(2,805		)	—			2,219		5,024		(2,464		)	—			2,560
Patents	5.9	2,441		(903		)	—			1,538		1,730		(778		)	—			952
Trade name	7.8	894		(46		)	—			848		894		(41		)	—			853
Developed technology	7.4	1,430		(369		)	—			1,061		1,430		(298		)	—			1,132
Amortizable intangible assets		$	19,075	$	(8,038	)	$	—		$	11,037	$	15,259	$	(7,244	)	$	—		$	8,015

Future Estimated Amortization Expense Related to Amortizable Intangible Assets

As of July 31, 2018, future estimated amortization expense related to amortizable intangible assets was estimated to be:

For fiscal years ending January 31 (in thousands):
2019	$	902
2020	1,783
2021	1,636
2022	1,150
2023	964
2024 and thereafter	4,602
Total	$	11,037