Long-term Debt - Additional Information (Detail)						3 Months Ended		9 Months Ended
	Nov. 01, 2017 USD ($)	Apr. 18, 2017 USD ($)	Nov. 01, 2016 USD ($)	Aug. 22, 2016 USD ($)	Apr. 30, 2015 USD ($)	Nov. 30, 2017 USD ($)	Nov. 30, 2016 USD ($)	Nov. 30, 2017 USD ($)	Nov. 30, 2016 USD ($)	Feb. 28, 2017 USD ($)	Nov. 07, 2014 USD ($)	Jun. 16, 2014 USD ($)	Jun. 10, 2014 USD ($)	May 30, 2012 USD ($)
Debt Instrument
Unamortized discount on issuance of debt						$ 4,000,000		$ 4,000,000		$ 7,038,000
Loss on debt extinguishment						(139,000)	$ (478,000)	(2,662,000)	$ (478,000)
Asset Sale Proceeds Subject to Reinvestment			$ 10,000,000
NextRadio notes payable [Member]
Debt Instrument
Interest rate during period												4.00%
Non-recourse debt												$ 4,000,000
Non-recourse debt
Debt Instrument
Face amount of debt						10,200,000.0		10,200,000.0		9,500,000.0
Non-recourse debt						9,971,000		9,971,000
98.7FM Non-recourse debt
Debt Instrument
Face amount of debt														$ 82,200,000
Interest rate during period														4.10%
Non-recourse debt						55,471,000		55,471,000		59,958,000
Digonex Non-recourse debt
Debt Instrument
Face amount of debt												$ 6,200,000
Interest rate during period												5.00%
Non-recourse debt												$ 3,600,000
Maximum
Debt Instrument
Debt Compliance Consolidated EBITDA permitted addback, Going Private not approved				$ 2,500,000
Debt Compliance Consolidated EBITDA permitted addback, Going Private approved				$ 8,000,000
98.7FM Non-recourse debt
Debt Instrument
Unamortized discount on issuance of debt						1,800,000		1,800,000		2,000,000
Revolver
Debt Instrument
Repayments of Debt			8,500,000
Two Thousand Fourteen Credit Agreement
Debt Instrument
Total Credit Agreement debt						78,451,000		$ 78,451,000		152,245,000
Provision for credit facility increase													$ 20,000,000
Commitment Fee, Percentage of Line of Credit and Term Loan								7500.00%
Commitment fee		1.00%						0.50%
Unamortized discount on issuance of debt						2,200,000		$ 2,200,000					5,100,000
Loss on debt extinguishment								$ 2,700,000
Contingent debt amendment fee								0.50%
Two Thousand Fourteen Credit Agreement | Term Loan
Debt Instrument
Total Credit Agreement debt						69,451,000		$ 69,451,000		152,245,000
Maximum borrowing capacity													185,000,000.0
Face amount of debt													185,000,000
Two Thousand Fourteen Credit Agreement | Revolver
Debt Instrument
Total Credit Agreement debt						$ 9,000,000		$ 9,000,000		$ 0
Maximum borrowing capacity													20,000,000.0
Two Thousand Fourteen Credit Agreement | Letter of Credit
Debt Instrument
Maximum borrowing capacity													$ 5,000,000.0
First Amendment to Two Thousand Fourteen Credit Agreement
Debt Instrument
Debt covenant increased leverage ratio amount								6.00
Debt covenant maximum severance expense excluded from consolidated EBITDA								$ 5,000,000
Debt covenant, maximum losses attributable to reformatting of radio stations included in consolidated EBITDA								$ 2,500,000.0
Prepayment fee, percentage								1.00%
Increase in basis spread on variable rate								0.25%
Debt covenant, leverage ratio threshold for applicable margin								5.00
Debt Issuance Costs, Net											$ 1,000,000
Second Amendment to Two Thousand Fourteen Credit Agreement [Member]
Debt Instrument
Payments of Debt Issuance Costs		$ 1,500,000
Debt Instrument, Periodic Payment, Percentage of Principal Due in Quarterly Installments, Period One					0.50%
Debt Instrument, Periodic Payment, Percentage of Principal Due in Quarterly Installments, Period Two					1.25%
Debt Instrument, Debt Covenant, Leverage Ratio, Period One, Maximum					6.75
Debt Instrument, Debt Covenant, Leverage Ratio, Period Two, Maximum					6.50
Debt Instrument, Debt Covenant, Leverage Ratio, Period Three, Maximum					6.25
Debt Instrument, Debt Covenant, Leverage Ratio, Period Four, Maximum					6.00
Debt Instrument, Debt Covenant, Leverage Ratio, Period Five, Maximum					5.75
Debt Instrument, Debt Covenant, Leverage Ratio, Period Six, Maximum					4.00
Debt Instrument, Prepayment Fee, Period One, Percentage					2.00%
Debt Instrument, Prepayment Fee, Period Two, Percentage					1.00%
Debt Issuance Costs, Net					$ 1,100,000
Term Loan
Debt Instrument
Repayments of Debt	$ 5,000,000		$ 15,000,000
Covenant Requirement
Debt Instrument
Debt covenant increased leverage ratio amount								4.00
Covenant Requirement | Minimum
Debt Instrument
Minimum Interest Coverage Ratio						1.60		1.60		2.00
Base Rate | Two Thousand Fourteen Credit Agreement
Debt Instrument
Basis spread on interest rate		6.00%						3.75%
Base Rate | Two Thousand Fourteen Credit Agreement | Minimum
Debt Instrument
Debt Instrument, Interest Rate, Stated Percentage						2.00%		2.00%
Base Rate | Second Amendment to Two Thousand Fourteen Credit Agreement [Member]
Debt Instrument
Basis spread on interest rate					5.00%
London Interbank Offered Rate (LIBOR) | Two Thousand Fourteen Credit Agreement
Debt Instrument
Basis spread on interest rate		7.00%						4.75%
London Interbank Offered Rate (LIBOR) | Two Thousand Fourteen Credit Agreement | Minimum
Debt Instrument
Debt Instrument, Interest Rate, Stated Percentage						1.00%		1.00%
London Interbank Offered Rate (LIBOR) | Second Amendment to Two Thousand Fourteen Credit Agreement [Member]
Debt Instrument
Basis spread on interest rate					6.00%