Fair Value Measurements (Details) [Line Items]

Investment transferred in/out, description

Reclassifications impacting Level 3 of the fair value hierarchy are reported as transfers in/out of the Level 3 category as of the beginning of the quarter in which the reclassifications occur. During the six months ended March 31, 2023, no investments were transferred in or out of Level 3. During the six months ended March 31, 2022, one of our investments transferred out of Level 3 and no investments transferred into Level 3.

$ 2.4

Fair Value Measurements (Details) [Line Items]

Fair Value Measurements (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Millions	Sep. 30, 2017	Mar. 31, 2023	Mar. 31, 2022
Fair Value Measurements (Details) [Line Items]
Net change in unrealized gain (loss)		$ 2.4	$ 2.4
Investment transferred in/out, description		Reclassifications impacting Level 3 of the fair value hierarchy are reported as transfers in/out of the Level 3 category as of the beginning of the quarter in which the reclassifications occur. During the six months ended March 31, 2023, no investments were transferred in or out of Level 3. During the six months ended March 31, 2022, one of our investments transferred out of Level 3 and no investments transferred into Level 3.
Membership interest percentage	5.00%
Aggregate fair value	$ 2.4
Lydell Jewelry Design Studio, LLC [Member]
Fair Value Measurements (Details) [Line Items]
Membership interest percentage	3.80%