Name:	cik0001645873_BusinessAndOrganizationLineItems
Namespace Prefix:	cik0001645873_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Number of Real Estate Properties, Held-for-Sale.

No definition available.

Name:	cik0001645873_NumberOfHeldForSaleRealEstateProperties
Namespace Prefix:	cik0001645873_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Number of Rentable Square Feet

No definition available.

Name:	cik0001645873_NumberOfRentableSquareFeet
Namespace Prefix:	cik0001645873_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Number of Assets Acquired

No definition available.

Name:	cik0001645873_NumberofAssetsAcquired
Namespace Prefix:	cik0001645873_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Sale of Stock, Expected Consideration on Transaction

No definition available.

Name:	cik0001645873_SaleOfStockExpectedConsiderationOnTransaction
Namespace Prefix:	cik0001645873_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Stock Repurchase Program, Minimum Share Value

No definition available.

Name:	cik0001645873_StockRepurchaseProgramMinimumShareValue
Namespace Prefix:	cik0001645873_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Stock Repurchase Program, Percentage of Net Asset Value, Shares Held at Least Three Years

No definition available.

Name:	cik0001645873_StockRepurchaseProgramPercentageOfNetAssetValueSharesHeldAtLeastThreeYears
Namespace Prefix:	cik0001645873_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Stock Repurchase Program, Percentage of Net Asset Value, Shares Held at Least Two Years

No definition available.

Name:	cik0001645873_StockRepurchaseProgramPercentageOfNetAssetValueSharesHeldAtLeastTwoYears
Namespace Prefix:	cik0001645873_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Stock Repurchase Program, Percentage of Net Asset Value, Shares Held Less than One Year

No definition available.

Name:	cik0001645873_StockRepurchaseProgramPercentageOfNetAssetValueSharesHeldLessThanOneYear
Namespace Prefix:	cik0001645873_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Stock Repurchase Program, Percentage of Net Asset Value, Shares Held Less than Two Years

No definition available.

Name:	cik0001645873_StockRepurchaseProgramPercentageOfNetAssetValueSharesHeldLessThanTwoYears
Namespace Prefix:	cik0001645873_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Stock Repurchase Program, Percentage of Net Asset Value, Shares Held One to Two Years

No definition available.

Name:	cik0001645873_StockRepurchaseProgramPercentageOfNetAssetValueSharesHeldOneToTwoYears
Namespace Prefix:	cik0001645873_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Stock Repurchase Program, Percentage of Net Asset Value, Shares Held Two to Three Years

No definition available.

Name:	cik0001645873_StockRepurchaseProgramPercentageOfNetAssetValueSharesHeldTwoToThreeYears
Namespace Prefix:	cik0001645873_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Face amount or stated value per share of common stock.

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

Name:	us-gaap_CommonStockSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Monetary value of common stock allocated to investors to buy shares of a new issue of common stock before they are offered to the public. When stock is sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the shares to the investor until it receives the entire proceeds.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=65888546&loc=d3e21300-112643

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_CommonStockSharesSubscriptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment in the future.

Name:	us-gaap_DepositsAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Net asset value per share or per unit of investments in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes fair value disclosure.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 35
-Paragraph 54B
-URI http://asc.fasb.org/extlink&oid=122636397&loc=SL7495116-110257

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 205
-Section 50
-Paragraph 7
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 205
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25866437&loc=d3e10246-115837

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-URI http://asc.fasb.org/extlink&oid=123874694&loc=SL6742756-110258

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 35
-Paragraph 59
-URI http://asc.fasb.org/extlink&oid=122636397&loc=SL6740821-110257

Name:	us-gaap_NetAssetValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

The number of real estate properties owned as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

Name:	us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

Name:	us-gaap_PreferredStockSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Price of a single share of a number of saleable stocks of a company.

No definition available.

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Number of new stock issued during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_StockRepurchaseProgramPeriodInForce1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AssetAcquisitionAxis=cik0001645873_REITIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RealEstatePropertiesAxis=cik0001645873_TenantincommonMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=us-gaap_RealEstateInvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementClassOfStockAxis=cik0001645873_CommonClassSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_PlanNameAxis=cik0001645873_DistributionReinvestmentPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsidiarySaleOfStockAxis=cik0001645873_IPOAndOverAllotmentOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_LegalEntityAxis=cik0001645873_ModivAcquisitionCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsidiarySaleOfStockAxis=cik0001645873_RegisteredOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsidiarySaleOfStockAxis=cik0001645873_FollowonOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsidiarySaleOfStockAxis=cik0001645873_A2021DistributionReinvestmentPlanOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_RetailSiteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_IndustrialPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_OwnershipAxis=cik0001645873_RWHoldingsNNNREITOperatingPartnershipLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_OwnershipAxis=cik0001645873_BrixInvestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: