Intangible Assets, Net

12 Months Ended

Jun. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets, Net

Intangible Assets, Net

Intangible assets, net consist of (in thousands):

	June 30,
	2021		2020
Patent costs	$	2,330	$	2,330
Accumulated amortization	(1,856)		(1,724)
Total definite-lived intangible assets, net	474		606
Trademarks and other indefinite-lived intangible assets	245		245
Total intangible assets, net	$	719	$	851

Amortization expense totaled $0.1 million, $0.1 million and $0.1 million for the fiscal years ended June 30, 2021, 2020 and 2019, respectively. As of June 30, 2021, the remaining weighted-average amortization period for definite-lived intangible assets was 3.75 years. Annual estimated amortization expense is expected to approximate $0.1 million for each of the four succeeding fiscal years.