Goodwill and Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of the Company's intangible assets

The following table highlights the Company’s intangible assets (amounts in thousands):

	March 31, 2018							March 31, 2017
	Carrying Amount		Accumulated Amortization			Net Amount		Carrying Amount		Accumulated Amortization			Net Amount
Indefinite Lived Intangible Assets:
Trademarks	$	15,474	$	—		$	15,474	$	7,207	$	—		$	7,207
Amortizing Intangibles:
Patents (10 - 18 years)	26,662		(10,625		)	16,037		26,660		(9,204		)	17,456
Customer relationships (10 - 21 years	40,131		(11,735		)	28,396		12,653		(7,535		)	5,118
Other	238		(238		)	—		214		(214		)	—
Total amortizing intangibles	67,031		22,598			44,433		39,527		(16,953		)	56,480
Total intangible assets	$	82,505	$	22,598		$	59,907	$	46,734	$	(16,953	)	$	63,687

Summary of changes in carrying amount of goodwill

For fiscal years ended March 31, 2018, 2017, and 2016, amortization related to intangibles was $4.3 million, $2.1 million and $2.2 million, respectively, consisting of amortization related to patents of $1.4 million, $1.5 million, and $1.6 million, respectively, and amortization related to customer relationships of $2.9 million, $0.6 million, and $0.6 million, respectively. The weighted-average useful life for patents was 15.8 years for the fiscal years ended March 31, 2018 and 2017, respectively, and for customer relationships was 12.3 years and 15.7 years, respectively. The weighted-average period prior to the next renewal for patents was 3.5 years and 0.5 years as of March 31, 2018 and 2017. Estimated amortization of intangible assets for each of the next five fiscal years is $4.6 million, and thereafter, amortization will total $21.3 million. Estimated amortization of patents for each of the next five fiscal years is $1.4 million, and thereafter, amortization will total $8.9 million. Estimated amortization of customer relationships for each of the next five fiscal years is $3.2 million, and thereafter, amortization will total $12.5 million.

For fiscal year 2018, the Company completed its impairment test on goodwill and intangible assets with indefinite useful lives as of January 1, 2018 and concluded that goodwill and indefinite-lived assets were not impaired. The were no changes to the carrying amount of goodwill for the years ended March 31, 2018 and 2017. As of March 31, 2018 and 2017, the carrying amount of goodwill was $40.3 million.