Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Jan. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

	Weighted Average Life at 1/31/18	January 31, 2018										January 31, 2017
		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	$	—		$	(3,063	)	$	3,997
Proprietary rights	4.9	$	6,181	$	(3,663	)	—			2,518		$	5,810	$	(3,003	)	—			2,807
Customer relationships	3.8	5,024		(2,464		)	—			2,560		4,679		(1,656		)	—			3,023
Patents	5.0	1,730		(778		)	—			952		1,608		(558		)	—			1,050
Trade name	8.3	894		(41		)	—			853		884		(27		)	—			857
Developed technology	7.9	1,430		(298		)	—			1,132		1,430		(155		)	—			1,275
Amortizable intangible assets		$	15,259	$	(7,244	)	$	—		$	8,015	$	14,411	$	(5,399	)	$	—		$	9,012

Future Estimated Amortization Expense Related to Amortizable Intangible Assets

As of January 31, 2018, future estimated amortization expense related to amortizable intangible assets is estimated to be (in thousands):

For fiscal years ending January 31:
2019	$	1,508
2020	1,508
2021	1,355
2022	820
2023	726
Thereafter	2,098
Total	$	8,015