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Goodwill and Other Intangible Assets
 9 Months Ended
Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets Goodwill and Other Intangible AssetsEffective July 1, 2019, the Company realigned its organizational structure into two reporting segments for the purpose of making operational decisions and assessing financial performance: (i) Compound Semiconductors and (ii) Photonic Solutions. All applicable information has been restated to reflect this change.
Changes in the carrying amount of goodwill were as follows ($000):
Nine Months Ended March 31, 2020
Compound
Semiconductors		Photonic
Solutions		Total
Balance-beginning of period$185,721  $134,057  $319,778  
Goodwill acquired—  963,939  963,939  
Foreign currency translation552  (2,507) (1,955) 
Balance-end of period$186,273  $1,095,489  $1,281,762  
The gross carrying amount and accumulated amortization of the Company’s intangible assets other than goodwill as of March 31, 2020 and June 30, 2019 were as follows ($000):
March 31, 2020June 30, 2019
Gross
Carrying
Amount		Accumulated
Amortization		Net
Book
Value		Gross
Carrying
Amount		Accumulated
Amortization		Net Book Value
Technology$427,034  $(59,222) $367,812  $91,637  $(39,679) $51,958  
Trade Names22,367  (3,000) 19,367  15,759  (1,601) 14,158  
Customer Lists458,964  (82,687) 376,277  132,872  (59,664) 73,208  
Other1,568  (1,568) —  1,572  (1,572) —  
Total$909,933  $(146,477) $763,456  $241,840  $(102,516) $139,324  
At March 31, 2020, the preliminary purchase price allocation of acquired intangible assets from Finisar is as follows ($000):
Gross Carrying AmountAccumulated AmortizationNet Book ValueWeighted Average Remaining Amortization Period (Years)
Technology$334,700  $(14,058) $320,642  12
Trade Names6,700  (1,301) 5,399  2.5
Customer Lists328,300  (17,416) 310,884  9.4
$669,700  $(32,775) $636,925  
As a result of the July 1, 2019 segment realignment, the Company reviewed the recoverability of the carrying value of goodwill at its reporting units. The Company performed a quantitative test to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill and other intangible assets. The Company did not record any impairment of goodwill or long-lived assets, as the quantitative assessment did not indicate deterioration in the fair value of its reporting units.