Holdings Credit Facility [Member] Holdings Credit Facility Rising Interest Rate Risk [Member] Rising Interest Rate Risk Note Redemption Interest Rate Risk [Member] Note Redemption Interest Rate Risk Leverage Risk [Member] Leverage Risk DB Credit Facility [Member] DB Credit Facility No Existing Trading Market For The Notes Risk [Member] No Existing Trading Market For The Notes Risk NMNLC Credit Facility II [Member] NMNLC Credit Facility II Material Limitations With Making Available Preliminary Estimates [Member] Material Limitations With Making Available Preliminary Estimates Unsecured Notes [Member] Unsecured Notes Default On Our Obligations Risk [Member] Default On Our Obligations Risk NMFC Credit Facility [Member] NMFC Credit Facility The Notes Will Be Unsecured Risk [Member] The Notes Will Be Unsecured Risk Downgrade, Suspension Or Withdrawal Of The Credit Rating Risk [Member] Downgrade, Suspension Or Withdrawal Of The Credit Rating Risk Debt Instrument, Name [Domain] The Notes Will Be Structurally Subordinated To The Indebtedness Risk [Member] The Notes Will Be Structurally Subordinated To The Indebtedness Risk 2022 Convertible Notes [Member] 2022 Convertible Notes SBA guaranteed debentures [Member] SBA guaranteed debentures The Notes Contain Limited Protection Risk [Member] The Notes Contain Limited Protection Risk