Intangible assets and goodwill

During the three months ended April 30, 2019 and 2018, the Company capitalized software development costs of $3.7 million and $2.1 million, respectively, related to significant enhancements and upgrades to its proprietary system.

The gross carrying amount and associated accumulated amortization of intangible assets were as follows as of April 30, 2019 and January 31, 2019:



(in thousands)	April 30, 2019			January 31, 2019
Amortized intangible assets:
Capitalized software development costs	$	44,328		$	40,583
Software	6,162			4,252
Other intangible assets	2,882			2,882
Acquired intangible member assets	85,110			85,110
Intangible assets, gross	138,482			132,827
Accumulated amortization	(57,045		)	(53,161		)
Intangible assets, net	$	81,437		$	79,666

During the three months ended April 30, 2019 and 2018, the Company expensed a total of $3.9 million and $3.2 million, respectively, in software development costs primarily related to the post-implementation and operation stages of its proprietary software.

Amortization expense for the three months ended April 30, 2019 and 2018 was $3.9 million and $3.7 million, respectively.

There were no changes to the goodwill carrying value during the three months ended April 30, 2019 and 2018.