Impact of COVID-19 (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020
Unusual or Infrequent Item, or Both [Line Items]
Total revenues	$ 545,165		$ 211,466
Genomic Test
Unusual or Infrequent Item, or Both [Line Items]
Change in testing volume (as a percent)	10.30%
Routine Clinical Test
Unusual or Infrequent Item, or Both [Line Items]
Change in testing volume (as a percent)	(6.80%)
Transfer of intellectual property and other
Unusual or Infrequent Item, or Both [Line Items]
Total revenues	$ 4,269		9,553
Services
Unusual or Infrequent Item, or Both [Line Items]
Increase in revenue	336,100
Total revenues	506,951		$ 170,839
CMS Accelerated and Advanced Payment Program, COVID-19
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from issuance of debt		$ 14,000
Distribution to Healthcare Providers, COVID-19
Unusual or Infrequent Item, or Both [Line Items]
Proceeds from issuance of debt	16,200
Distribution to Healthcare Providers, COVID-19 | Transfer of intellectual property and other
Unusual or Infrequent Item, or Both [Line Items]
Total revenues	$ 16,200