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Leases	6 Months Ended
Leases	Mar. 31, 2022
Leases [Abstract]
Leases	Leases Our Wireless segment has an operating lease for a building in Fridley, Minnesota for Fulton Technologies, Inc. As a result of closing down and vacating Fulton Technologies, Inc.’s Minnesota office in May 2019, a third-party telecom company began subleasing this building in June 2019. The lease term expired on December 31, 2021. Our Telco segment has an operating lease for a building in Jessup, Maryland for Nave Communications. As a result of moving Nave’s operations to Palco Telecom, a third-party logistics provider in Huntsville, Alabama, in fiscal year 2020, Nave completely vacated the building in May 2020 and has subleased part of the building through the end of the lease period. Rental payments received related to these subleases were recorded as a reduction to rent expense in our consolidated statements of operations for the three and six month periods ending March 31, 2022 and 2021.