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Intangible Assets | 12 Months Ended
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Jun. 30, 2020
Intangible Assets | Note 5. Intangible Assets Intangible assets consisted of the following, in thousands:
|  | June 30, |
|  | 2020 |  |  | 2019 |
S*Bio Patents—Gross |  | $ | 273 |  |  | $ | 500 |
Less: accumulated amortization |  |  | (273 | ) |  |  | (239 | )
Intangible assets, net |  | $ | — |  |  | $ | 261 |
Amortization expense of intangible assets for the years ended June 30, 2020, 2019 and 2018 was $34,000, $35,000 and $35,000, respectively. As a result of Helsinn discontinuing the Phase 3 study of pracinostat in AML, we assessed the estimated future cash flows associated with the patents acquired from S*Bio and recorded an impairment charge of $0.2 million to write off the remaining book value of the intangible assets.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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Namespace Prefix: | us-gaap_
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