The following table summarizes our intangible assets and software development costs:

	December 31 and March 31, 2020
	Gross								Net
	carrying		Accumulated			Accumulated			carrying
(In thousands)	amount		amortization			Impairment			amount
Amortized intangible assets:
Customer relationships	$	10,775	$	(10,775	)	$	—		$	—
Non-competition agreements		2,700		(2,700	)		—			—
Developed technology		10,398		(10,398	)		—			—
Trade names		230		(230	)		—			—
Patented technology		80		(80	)		—			—
		24,183		(24,183	)		—			—
Trade names		8,400	N/A				—			8,400
Total intangible assets	$	32,583	$	(24,183	)	$	—		$	8,400
(In thousands)
Software development costs	$	67,541	$	(45,535	)	$	(22,006	)	$	—

As of March 31, 2020, management determined the net realizable value of the remaining capitalized software development costs for certain solutions within our rGuest suite of products no longer exceeded their carrying value, and as a result, recorded non-cash impairment charges of $22.0 million for the year ended March 31, 2020. The impact of the COVID-19 pandemic on the hospitality industry resulted in economic conditions that made it difficult to project future sales and revenue accurately for the related rGuest solutions. After evaluating the Company’s strategy for market development and continued costs to support the software, an impairment charge was required. The amount of impairment recognized during the year ended March 31, 2020 reduced the carrying value of capitalized software development costs to zero with no remaining amortization expense to be recognized in future periods.

Amortization expense for software development costs related to assets to be sold, leased, or otherwise marketed was $3.1 million and $9.4 million for the three and nine months ended December 31, 2019. These charges are included as costs of goods sold - products in our condensed consolidated statements of operations.