Intangible Assets and Goodwill - Summary of Intangible Impairment by Assessment Period (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss on intangible assets	$ 343	$ 265	$ 9,843
Interim Assessment | Goodwill
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss on intangible assets			2,058
Interim Assessment | Finite-Lived Intangible Assets
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss on intangible assets			930
Annual Assessment | Goodwill
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss on intangible assets		$ 265
Annual Assessment | FCC Licenses
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment loss on intangible assets	$ 343		$ 6,855