Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Apr. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

	Weighted Average Life at 4/30/2018	April 30, 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	8.1	$	9,354	$	(3,806	)	$	—		5,548		$	6,181	$	(3,663	)	$	—		2,518
Customer relationships	3.6	5,024		(2,634		)	—			2,390		5,024		(2,464		)	—			2,560
Patents	6.1	2,441		(841		)	—			1,600		1,730		(778		)	—			952
Trade name	8.1	894		(44		)	—			850		894		(41		)	—			853
Developed technology	7.7	1,430		(334		)	—			1,096		1,430		(298		)	—			1,132
Amortizable intangible assets		$	19,143	$	(7,659	)	$	—		$	11,484	$	15,259	$	(7,244	)	$	—		$	8,015

Future Estimated Amortization Expense Related to Amortizable Intangible Assets

As of April 30, 2018, future estimated amortization expense related to amortizable intangible assets was estimated to be:

For fiscal years ending January 31 (in thousands):
2019	$	1,353
2020	1,789
2021	1,638
2022	1,150
2023	964
Thereafter	4,590
Total	$	11,484