Inventory (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Jun. 30, 2020
Inventory [Line Items]
Finished goods	$ 20,267	$ 15,618
Airtime Inventory Subject To Sale Restrictions [Member]
Inventory [Line Items]
Finished goods	$ 16,000

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_InventoryFinishedGoods
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant