The net carrying amount of dry dock and special survey costs as of the balance sheet date.

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Contractual right on the sale price of an asset agreed in a Memorandum of Agreement.

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The vessels' capacity in deadweight tonnage (DWT).

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The type of vessel.

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The year that the vessel was built.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Fair value portion of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Vessels, Net (Details) $ in Thousands	3 Months Ended				4 Months Ended			5 Months Ended		6 Months Ended			8 Months Ended	9 Months Ended		10 Months Ended	11 Months Ended		12 Months Ended
Vessels, Net (Details) $ in Thousands	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Mar. 21, 2019 USD ($)	Jun. 30, 2018 USD ($)	Apr. 23, 2019 USD ($)	May 09, 2018 USD ($)	Apr. 27, 2018 USD ($)	Jun. 07, 2018 USD ($)	May 21, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jul. 02, 2018 USD ($)	Jun. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)	Oct. 02, 2018 USD ($)	Sep. 30, 2018 USD ($)	Oct. 25, 2018 USD ($)	Dec. 14, 2018 USD ($)	Dec. 04, 2018 USD ($)	Dec. 31, 2018 USD ($)
Property Plant And Equipment [Line Items]
Fees and costs related to vessels' regulatory requirements	$ 5,767			$ 0						$ 5,767		$ 0
Contractual Obligation	20,817									20,817
Vessel impairment losses	0			$ 37,860						7,345		37,860
Vessels, net	1,009,973									1,009,973									$ 1,043,250
Net cash proceeds from sale of vessels										$ 5,978		0
Navios Altair I
Property Plant And Equipment [Line Items]
Vessel year built										2006
Vessel type										Panamax
Vessel capacity in DWT										74,475
Purchase price								$ 11,842
Navios Symmetry
Property Plant And Equipment [Line Items]
Vessel year built										2006
Vessel type										Panamax
Vessel capacity in DWT										74,381
Purchase price									$ 11,811
Navios Apollon I
Property Plant And Equipment [Line Items]
Vessel year built										2005
Vessel type										Panamax
Vessel capacity in DWT										87,052
Purchase price						$ 13,446
Navios Sphera And Navios Mars
Property Plant And Equipment [Line Items]
Purchase price													$ 79,000
Navios Sphera
Property Plant And Equipment [Line Items]
Vessel year built										2016
Vessel type										Panamax
Vessel capacity in DWT										84,872
Navios Galaxy I
Property Plant And Equipment [Line Items]
Vessels, Fair value	5,978									$ 5,978
Vessel impairment losses		$ 7,345
Dry dock and special survey costs, net					$ 363
Vessels, net					13,323
Net cash proceeds from sale of vessels					5,978
Sale price agreed in Memorandum of Agreement			$ 5,978
Gain / (Loss) on sale of vessel					$ (28)
Navios Libra II
Property Plant And Equipment [Line Items]
Vessels, Fair value																			4,559
Vessel impairment losses																			1,226
Dry dock and special survey costs, net																	$ 657
Vessels, net																	5,784
Net cash proceeds from sale of vessels																	$ 4,559
Sale price agreed in Memorandum of Agreement																$ 4,559
Navios Felicity
Property Plant And Equipment [Line Items]
Vessels, Fair value																			$ 4,705
Vessel impairment losses															$ 5,258
Dry dock and special survey costs, net																		$ 818
Vessels, net																		10,016
Net cash proceeds from sale of vessels																		4,705
Sale price agreed in Memorandum of Agreement														$ 4,705
Gain / (Loss) on sale of vessel																		$ (53)
YM Unity and YM Utmost
Property Plant And Equipment [Line Items]
Vessel impairment losses												$ 37,860
Dry dock and special survey costs, net	2,104									2,104	$ 2,104
Vessels, net	104,860									$ 104,860	104,860
Net cash proceeds from sale of vessels											67,000
Sale price agreed in Memorandum of Agreement							$ 67,000
Repayment of debt											$ 20,200
Navios Mars
Property Plant And Equipment [Line Items]
Vessel year built										2016
Vessel type										Capesize
Vessel capacity in DWT										181,259
Including Ballast Water Treatment System Installation
Property Plant And Equipment [Line Items]
Fees and costs related to vessels' regulatory requirements	$ 5,767									$ 5,767