KBS Growth & Income REIT (KBSG) 10-K 8 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 01, 2019	Jun. 30, 2018
Document and Entity Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Entity Registrant Name	KBS Growth & Income REIT, Inc.
Entity Central Index Key	1,631,256
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 0
Class A common stock
Document and Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		9,487,784
Class T common stock
Document and Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		297,237

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Real estate:
Land	$ 31,309	$ 31,309
Buildings and improvements	143,461	142,400
Tenant origination and absorption costs	15,981	17,047
Total real estate, cost	190,751	190,756
Less accumulated depreciation and amortization	(17,116)	(9,627)
Total real estate, net	173,635	181,129
Cash and cash equivalents	6,648	2,523
Rents and other receivables	3,058	1,920
Above-market leases, net	150	180
Prepaid expenses and other assets	2,171	1,388
Total assets	185,662	187,140
Liabilities and stockholders’ equity
Notes payable, net	116,833	112,780
Accounts payable and accrued liabilities	3,239	2,717
Due to affiliates	3,641	1,787
Distributions payable	433	385
Below-market leases, net	3,868	5,910
Other liabilities	2,057	1,828
Total liabilities	130,071	125,407
Commitments and contingencies (Note 10)
Redeemable common stock	1,000	2,314
Stockholders’ equity:
Preferred stock, $.01 par value; 10,000,000 shares authorized, no shares issued and outstanding	0	0
Additional paid-in capital	79,907	76,265
Cumulative distributions and net losses	(25,413)	(16,940)
Total stockholders’ equity	54,591	59,419
Total liabilities and stockholders’ equity	185,662	187,140
Class A common stock
Stockholders’ equity:
Common stock	94	91
Class T common stock
Stockholders’ equity:
Common stock	$ 3	$ 3

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	9,386,908	9,149,100
Common stock, shares outstanding (in shares)	9,386,908	9,149,100
Class T common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	294,963	281,537
Common stock, shares outstanding (in shares)	294,963	281,537

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Rental income	$ 18,028	$ 13,577	$ 6,179
Tenant reimbursements	3,993	3,288	630
Other operating income	159	96	46
Total revenues	22,180	16,961	6,855
Expenses:
Operating, maintenance, and management	4,734	3,783	1,497
Property management fees and expenses to affiliate	170	124	68
Real estate taxes and insurance	2,786	2,087	619
Asset management fees to affiliate	1,855	632	399
Real estate acquisition fees to affiliate	0	0	2,316
Real estate acquisition fees and expenses	0	0	405
General and administrative expenses	1,452	1,471	1,532
Depreciation and amortization	9,529	7,618	3,004
Interest expense	5,302	3,287	1,224
Total expenses	25,828	19,002	11,064
Other income (loss):
Interest and other income	47	48	120
Loss from extinguishment of debt	0	(206)	0
Total other income (loss)	47	(158)	120
Net loss	(3,601)	(2,199)	(4,089)
Class A common stock
Other income (loss):
Net loss	$ (3,492)	$ (2,131)	$ (4,080)
Net loss per common share, basic and diluted (in dollars per share)	$ (0.38)	$ (0.23)	$ (0.55)
Weighted-average number of common shares outstanding, basic and diluted (in shares)	9,205,952	9,080,826	7,393,983
Class T common stock
Other income (loss):
Net loss	$ (109)	$ (68)	$ (9)
Net loss per common share, basic and diluted (in dollars per share)	$ (0.38)	$ (0.28)	$ (0.68)
Weighted-average number of common shares outstanding, basic and diluted (in shares)	288,586	246,737	13,718

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Additional Paid-in Capital	Cumulative Distributions and Net Losses	Class A	Class ACommon Stock	Class T	Class TCommon Stock
Balance (in shares) at Dec. 31, 2015					2,216,821		0
Balance at Dec. 31, 2015	$ 16,106	$ 17,079	$ (995)		$ 22		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(4,089)		(4,089)	$ (4,080)		$ (9)
Issuance of common stock (in shares)					6,559,574		93,918
Issuance of common stock	60,598	60,532			$ 65		$ 1
Transfers to redeemable common stock	$ (1,738)	(1,738)
Stock dividends issued (in shares)	69,869				69,769		100
Stock dividends issued	$ 0	711	(712)		$ 1
Distributions declared	(3,655)		(3,655)
Commissions on stock sales, dealer manager fees and stockholder servicing fees to affiliate	(4,200)	(4,200)
Other offering costs	(392)	(392)
Balance (in shares) at Dec. 31, 2016					8,846,164		94,018
Balance at Dec. 31, 2016	62,630	71,992	(9,451)		$ 88		$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,199)		(2,199)	$ (2,131)		$ (68)
Issuance of common stock (in shares)					380,538		185,845
Issuance of common stock	5,421	5,417			$ 2		$ 2
Transfers to redeemable common stock	(523)	(523)
Redemptions of common stock (in shares)					(145,214)
Redemptions of common stock	$ (1,210)	(1,210)
Stock dividends issued (in shares)	69,286				67,612		1,674
Stock dividends issued	$ 0	706	(707)		$ 1
Distributions declared	(4,583)		(4,583)
Commissions on stock sales, dealer manager fees and stockholder servicing fees to affiliate	(103)	(103)
Other offering costs	(14)	(14)
Balance (in shares) at Dec. 31, 2017				9,149,100	9,149,100	281,537	281,537
Balance at Dec. 31, 2017	59,419	76,265	(16,940)		$ 91		$ 3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,601)		(3,601)	$ (3,492)		$ (109)
Issuance of common stock (in shares)					514,880		13,426
Issuance of common stock	4,645	4,639			$ 6		$ 0
Transfers from redeemable common stock	1,314	1,314
Redemptions of common stock (in shares)					(277,072)
Redemptions of common stock	(2,314)	(2,311)			$ (3)
Distributions declared	(4,872)		(4,872)
Balance (in shares) at Dec. 31, 2018				9,386,908	9,386,908	294,963	294,963
Balance at Dec. 31, 2018	$ 54,591	$ 79,907	$ (25,413)		$ 94		$ 3

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows from Operating Activities:
Net loss	$ (3,601)	$ (2,199)	$ (4,089)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	9,529	7,618	3,004
Property damage loss	0	0	134
Deferred rents	(1,083)	(898)	(500)
Allowance for doubtful accounts	54	161	31
Amortization of above- and below-market leases, net	(2,012)	(1,484)	(708)
Amortization of deferred financing costs	344	725	162
Unrealized loss (gain) on derivative instrument	86	(178)	0
Loss from extinguishment of debt	0	206	0
Changes in operating assets and liabilities:
Rents and other receivables	(109)	(159)	(93)
Prepaid expenses and other assets	(877)	(812)	(444)
Accounts payable and accrued liabilities	274	289	1,641
Due to affiliates	1,854	416	(172)
Other liabilities	(180)	574	999
Net cash provided by (used in) operating activities	4,279	4,259	(35)
Cash Flows from Investing Activities:
Acquisitions of real estate	0	(43,659)	(115,034)
Improvements to real estate	(1,654)	(3,772)	(124)
Net cash used in investing activities	(1,654)	(47,431)	(115,158)
Cash Flows from Financing Activities:
Proceeds from notes payable	45,000	42,250	71,589
Principal payments on notes payable	(41,000)	(11,260)	(5,125)
Payments of deferred financing costs	(7)	(417)	(1,308)
Cash distribution advance from affiliate	0	0	1,139
Proceeds from issuance of common stock	2,670	3,107	58,805
Payments to redeem common stock	(2,314)	(1,210)	0
Payments of commissions on stock sales and related dealer manager fees	0	(103)	(4,200)
Other offering costs paid to affiliates	0	(63)	(968)
Payments of other offering costs	0	(14)	(392)
Distributions paid to common stockholders	(2,849)	(2,261)	(1,574)
Net cash provided by financing activities	1,500	30,029	117,966
Net increase (decrease) in cash and cash equivalents	4,125	(13,143)	2,773
Cash and cash equivalents, beginning of period	2,523	15,666
Cash and cash equivalents, end of period	6,648	2,523	15,666
Supplemental Disclosure of Cash Flow Information:
Interest paid	4,807	2,605	1,077
Supplemental Disclosure of Noncash Investing and Financing Activities:
Stock dividends issued	0	707	712
Increase in cash distributions payable	48	0	289
Dividends paid to common stockholders through common stock issuances pursuant to the distribution reinvestment plan	1,975	2,314	1,792
Increase in accrued improvements to real estate	$ 267	$ 393	$ 61

ORGANIZATION

ORGANIZATION	12 Months Ended
	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	ORGANIZATION KBS Growth & Income REIT, Inc. (the “Company”) was formed on January 12, 2015 as a Maryland corporation that elected to be taxed as a real estate investment trust (“REIT”) beginning with the taxable year ended December 31, 2015. Substantially all of the Company’s business is conducted through KBS Growth & Income Limited Partnership (the “Operating Partnership”), a Delaware limited partnership formed on January 14, 2015. The Company is the sole general partner of, and owns a 0.1% partnership interest in, the Operating Partnership. KBS Growth & Income REIT Holdings LLC (“REIT Holdings”), a Delaware limited liability company formed on January 14, 2015, owns the remaining 99.9% partnership interest in the Operating Partnership and is the sole limited partner. The Company is the sole member and manager of REIT Holdings. Subject to certain restrictions and limitations, the business of the Company is externally managed by KBS Capital Advisors LLC (the “Advisor”), an affiliate of the Company, pursuant to an advisory agreement between the Company and the Advisor initially entered into on June 11, 2015, and amended at various times thereafter (the “Advisory Agreement”). The Advisor conducts the Company’s operations and manages its portfolio of core real estate properties. On January 27, 2015, the Company issued 20,000 shares of its common stock to the Advisor at a purchase price of $10.00 per share. On June 11, 2015, these outstanding shares of common stock were designated Class A shares of common stock. As of December 31, 2018 , the Company had invested in four office properties. The Company intends to invest in a diverse portfolio of core real estate properties. The Company considers core properties to be existing properties with at least 80% occupancy. Based on the current market outlook, the Company expects its core focus in the U.S. office sector to reflect a value-creating core strategy, which is also known as a core-plus strategy. The Company commenced a private placement offering exempt from registration pursuant to Rule 506(b) of Regulation D of the Securities Act of 1933, as amended, on June 11, 2015, pursuant to which the Company offered a maximum of $105,000,000 in shares of its Class A common stock for sale to accredited investors (the “Initial Private Offering”), of which $5,000,000 of Class A shares were offered pursuant to the Company’s distribution reinvestment plan. The Company ceased offering shares in the primary portion of the Initial Private Offering on April 27, 2016 and processed subscriptions for the primary Initial Private Offering dated on or prior to April 27, 2016 through May 30, 2016. KBS Capital Markets Group LLC (the “Dealer Manager”), an affiliate of the Advisor, served as the dealer manager of the Initial Private Offering pursuant to a dealer manager agreement dated June 11, 2015 (the “Initial Private Offering Dealer Manager Agreement”). On February 4, 2015, the Company filed a registration statement on Form S-11 with the Securities and Exchange Commission (the “SEC”) to register an initial public offering of its common stock to offer a maximum of $1,500,000,000 in shares of common stock for sale to the public in a primary offering, consisting of two classes of shares: Class A and Class T (the “Primary Offering”) and a maximum of $800,000,000 in both classes of shares of its common stock pursuant to the Company’s distribution reinvestment plan (the “DRP Offering” and, together with the Primary Offering, the “Public Offering”). The SEC declared the Company’s registration statement effective on April 28, 2016 and the Company retained the Dealer Manager to serve as the dealer manager of the Public Offering pursuant to a dealer manager agreement dated April 28, 2016 (the “Public Offering Dealer Manager Agreement”). The Company terminated the Primary Offering effective June 30, 2017. The Company continues to offer shares of common stock pursuant to the DRP Offering. In some states, the Company will need to renew the registration statement annually to continue the DRP Offering. The Company may terminate the DRP Offering at any time. On October 3, 2017, the Company launched a private placement offering exempt from registration pursuant to Rule 506(c) of Regulation D of the Securities Act pursuant to which the Company is currently offering a maximum of $1,000,000,000 in shares of its Class A common stock to accredited investors (the “Second Private Offering”). Prior to the launch of the Second Private Offering, on September 29, 2017, the Company entered into a dealer manager agreement (the “NCPS Dealer Agreement”) with the Advisor and North Capital Private Securities Corporation (“NCPS”) in connection with the Second Private Offering. The Company sold 8,548,972 shares of Class A common stock for gross offering proceeds of $76.8 million in the Initial Private Offering, including 74,744 shares of Class A common stock under its distribution reinvestment plan for gross offering proceeds of $0.7 million . The Company sold 122,721 and 270,415 shares of Class A and Class T common stock, respectively, in the Primary Offering for aggregate gross offering proceeds of $3.9 million . As of December 31, 2018 , the Company had sold 566,328 and 22,774 shares of Class A and Class T common stock, respectively, in the DRP Offering for aggregate gross offering proceeds of $5.4 million . As of December 31, 2018 , the Company had sold 343,069 shares of Class A common stock in the Second Private Offering for aggregate gross offering proceeds of $3.0 million . As of December 31, 2018 , the Company had redeemed 422,286 Class A shares for $3.5 million . On August 11, 2015, two of the individuals who own and control the Company’s sponsor, Charles J. Schreiber, Jr. (who also acts as chief executive officer, the chairman of the board and a director of the Company) and Peter M. Bren (who also acts as president and director of the Company), purchased 21,181.2380 and 21,181.2390 shares of Class A common stock, respectively, each for an aggregate purchase price of $172,500 or $8.144 per share. The per share purchase price reflected an 8.5% discount to the $8.90 offering price in the Initial Private Offering in effect on the date of their purchase because selling commissions and dealer manager fees were not paid in connection with the sales. Mr. Bren’s investment was made on behalf of and for the account of three of his children, and he has disclaimed beneficial ownership of the shares. The Company issued these shares in private transactions exempt from the registration requirements pursuant to Section 4(a)(2) of the Securities Act of 1933. As described above, the Company intends to use substantially all of the net proceeds from its offerings to invest in a diverse portfolio of core real estate properties.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation and Basis of Presentation The consolidated financial statements include the accounts of the Company, REIT Holdings, and the Operating Partnership and their direct and indirect wholly owned subsidiaries. All significant intercompany balances and transactions are eliminated in consolidation. The accompanying consolidated financial statements and notes thereto have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) as contained within the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and the rules and regulations of the SEC. Use of Estimates The preparation of the consolidated financial statements and the accompanying notes thereto in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates. Revenue Recognition Real Estate The Company recognizes minimum rent, including rental abatements, lease incentives and contractual fixed increases attributable to operating leases, on a straight-line basis over the term of the related leases when collectibility is reasonably assured and records amounts expected to be received in later years as deferred rent receivable. If the lease provides for tenant improvements, the Company determines whether the tenant improvements, for accounting purposes, are owned by the tenant or the Company. When the Company is the owner of the tenant improvements, the tenant is not considered to have taken physical possession or have control of the physical use of the leased asset until the tenant improvements are substantially completed. When the tenant is the owner of the tenant improvements, any tenant improvement allowance (including amounts that the tenant can take in the form of cash or a credit against its rent) that is funded is treated as a lease incentive and amortized as a reduction of revenue over the lease term. Tenant improvement ownership is determined based on various factors including, but not limited to: • whether the lease stipulates how a tenant improvement allowance may be spent; • whether the amount of a tenant improvement allowance is in excess of market rates; • whether the tenant or landlord retains legal title to the improvements at the end of the lease term; • whether the tenant improvements are unique to the tenant or general-purpose in nature; and • whether the tenant improvements are expected to have any residual value at the end of the lease. The Company records property operating expense reimbursements due from tenants for common area maintenance, real estate taxes, and other recoverable costs in the period the related expenses are incurred. The Company makes estimates of the collectibility of its tenant receivables related to base rents, including deferred rent receivable, expense reimbursements and other revenue or income. Management specifically analyzes accounts receivable, deferred rent receivable, historical bad debts, customer creditworthiness, current economic trends and changes in customer payment terms when evaluating the adequacy of the allowance for doubtful accounts. In addition, with respect to tenants in bankruptcy, management makes estimates of the expected recovery of pre-petition and post-petition claims in assessing the estimated collectibility of the related receivable. In some cases, the ultimate resolution of these claims can exceed one year. When a tenant is in bankruptcy, the Company will record a bad debt reserve for the tenant’s receivable balance and generally will not recognize subsequent rental revenue until cash is received or until the tenant is no longer in bankruptcy and has the ability to make rental payments. Effective January 1, 2018, the Company adopted ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU No. 2014-09”) using the modified retrospective approach, which requires a cumulative effect adjustment as of the date of the Company’s adoption. Under the modified retrospective approach, an entity may also elect to apply this standard to either (i) all contracts as of January 1, 2018 or (ii) only to contracts that were not completed as of January 1, 2018. A completed contract is a contract for which all (or substantially all) of the revenue was recognized under legacy GAAP that was in effect before the date of initial application. The Company elected to apply this standard only to contracts that were not completed as of January 1, 2018. Based on the Company’s evaluation of contracts within the scope of ASU No. 2014-09, revenue that is impacted by ASU No. 2014-09 includes revenue generated by sales of real estate, other operating income and tenant reimbursements for substantial services earned at the Company’s properties. The recognition of such revenue will occur when the services are provided and the performance obligations are satisfied. For the year ended December 31, 2018 , tenant reimbursements for substantial services accounted for under ASU No. 2014-09 were $0.1 million and were included in tenant reimbursements on the accompanying statements of operations. Sales of Real Estate Effective January 1, 2018, the Company adopted the guidance of ASC 610-20, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (“ASC 610-20”) , which applies to sales or transfers to noncustomers of nonfinancial assets or in substance nonfinancial assets that do not meet the definition of a business. Generally, the Company’s sales of real estate would be considered a sale of a nonfinancial asset as defined by ASC 610-20. ASC 610-20 refers to the revenue recognition principles under ASU No. 2014-09. Under ASC 610-20, if the Company determines it does not have a controlling financial interest in the entity that holds the asset and the arrangement meets the criteria to be accounted for as a contract, the Company would derecognize the asset and recognize a gain or loss on the sale of the real estate when control of the underlying asset transfers to the buyer. As a result of the adoption of ASU 610-20, there was no impact to the Company’s consolidated financial statements of operations for the years ended December 31, 2018 and 2017 since the Company did not sell any real estate properties for those periods. Cash and Cash Equivalents The Company recognizes interest income on its cash and cash equivalents as it is earned and classifies such amounts as other interest income. Real Estate Depreciation and Amortization Real estate costs related to the acquisition and improvement of properties are capitalized and amortized over the expected useful life of the asset on a straight-line basis. Repair and maintenance costs are charged to expense as incurred and significant replacements and betterments are capitalized. Repair and maintenance costs include all costs that do not extend the useful life of the real estate asset. The Company considers the period of future benefit of an asset to determine its appropriate useful life. Expenditures for tenant improvements are capitalized and amortized over the shorter of the tenant’s lease term or expected useful life. The Company anticipates the estimated useful lives of its assets by class to be generally as follows: Buildings 25 - 40 years Building improvements 10 - 25 years Tenant improvements Shorter of lease term or expected useful life Tenant origination and absorption costs Remaining term of related leases, including below-market renewal periods Real Estate Acquisition Valuation As a result of the Company’s early adoption of ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business , acquisitions of real estate beginning January 1, 2017 could qualify as asset acquisitions (as opposed to business combinations). The Company records the acquisition of income-producing real estate or real estate that will be used for the production of income as a business combination or an asset acquisition. If substantially all of the fair value of the gross assets acquired are concentrated in a single identifiable asset or group of similar identifiable assets, then the set is not a business. For purposes of this test, land and buildings can be combined along with the intangible assets for any in-place leases and accordingly, most acquisitions of investment properties would not meet the definition of a business and would be accounted for as an asset acquisition. To be considered a business, a set must include an input and a substantive process that together significantly contributes to the ability to create an output. All assets acquired and liabilities assumed in a business combination are measured at their acquisition-date fair values. For asset acquisitions, the cost of the acquisition is allocated to individual assets and liabilities on a relative fair value basis. Acquisition costs associated with business combinations are expensed as incurred. Acquisition costs associated with asset acquisitions are capitalized. The Company assesses the acquisition date fair values of all tangible assets, identifiable intangibles and assumed liabilities using methods similar to those used by independent appraisers, generally utilizing a discounted cash flow analysis that applies appropriate discount and/or capitalization rates and available market information. Estimates of future cash flows are based on a number of factors, including historical operating results, known and anticipated trends, and market and economic conditions. The fair value of tangible assets of an acquired property considers the value of the property as if it were vacant. The Company records above-market and below-market in-place lease values for acquired properties based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) management’s estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of above-market in-place leases and for the initial term plus any extended term for any leases with below-market renewal options. The Company amortizes any recorded above-market or below-market lease values as a reduction or increase, respectively, to rental income over the remaining non-cancelable terms of the respective lease, including any below-market renewal periods. The Company estimates the value of tenant origination and absorption costs by considering the estimated carrying costs during hypothetical expected lease up periods, considering current market conditions. In estimating carrying costs, the Company includes real estate taxes, insurance and other operating expenses and estimates of lost rentals at market rates during the expected lease up periods. The Company amortizes the value of tenant origination and absorption costs to depreciation and amortization expense over the remaining non-cancelable term of the leases. Estimates of the fair values of the tangible assets, identifiable intangibles and assumed liabilities require the Company to make significant assumptions to estimate market lease rates, property-operating expenses, carrying costs during lease-up periods, discount rates, market absorption periods, and the number of years the property will be held for investment. Impairment of Real Estate and Related Intangible Assets and Liabilities The Company continually monitors events and changes in circumstances that could indicate that the carrying amounts of its real estate and related intangible assets and liabilities may not be recoverable or realized. When indicators of potential impairment suggest that the carrying value of real estate and related intangible assets and liabilities may not be recoverable, the Company assesses the recoverability by estimating whether the Company will recover the carrying value of the real estate and related intangible assets and liabilities through its undiscounted future cash flows and its eventual disposition. If, based on this analysis, the Company does not believe that it will be able to recover the carrying value of the real estate and related intangible assets and liabilities, the Company would record an impairment loss to the extent that the carrying value exceeds the estimated fair value of the real estate and related intangible assets and liabilities. Cash and Cash Equivalents The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents may include cash and short-term investments. Cash and cash equivalents are stated at cost, which approximates fair value. The Company’s cash and cash equivalents balance exceeds federally insurable limits as of December 31, 2018 . The Company intends to mitigate this risk by depositing funds with a major financial institution; however, these cash balances could be impacted if the underlying financial institutions fail or are subject to other adverse conditions in the financial markets. There were no restrictions on the use of the Company’s cash and cash equivalents as of December 31, 2018 . Rents and Other Receivables The Company periodically evaluates the collectibility of amounts due from tenants and maintains an allowance for doubtful accounts for estimated losses resulting from the inability of tenants to make required payments under lease agreements. In addition, the Company maintains an allowance for deferred rent receivable that arises from the straight-lining of rents. The Company exercises judgment in establishing these allowances and considers payment history and current credit status of its tenants in developing these estimates. Derivative Instruments The Company enters into derivative instruments for risk management purposes to hedge its exposure to cash flow variability caused by changing interest rates on its variable rate notes payable. The Company records these derivative instruments at fair value on the accompanying consolidated balance sheets. Derivative instruments designated and qualifying as a hedge of the exposure to variability in expected future cash flows or other types of forecasted transactions are considered cash flow hedges. The change in fair value of the effective portion of a derivative instrument that is designated as a cash flow hedge is recorded as other comprehensive income (loss) on the accompanying consolidated statements of comprehensive income (loss) and consolidated statements of stockholders’ equity. The changes in fair value for derivative instruments that are not designated as a hedge or that do not meet the hedge accounting criteria are recorded as gain or loss on derivative instruments and included in interest expense as presented in the accompanying consolidated statements of operations. For those instruments designated as cash flow hedges, the Company formally documents all relationships between hedging instruments and hedged items, as well as its risk-management objectives and strategy for undertaking various hedge transactions. This process includes designating all derivative instruments that are part of a hedging relationship to specific forecasted transactions or recognized obligations on the consolidated balance sheets. The Company also assesses and documents, both at the hedging instrument’s inception and on a quarterly basis thereafter, whether the derivative instruments that are used in hedging transactions are highly effective in offsetting changes in cash flows associated with the respective hedged items. When the Company determines that a derivative instrument ceases to be highly effective as a hedge, or that it is probable the underlying forecasted transaction will not occur, the Company discontinues hedge accounting prospectively and reclassifies amounts recorded to accumulated other comprehensive income (loss) to earnings. Deferred Financing Costs Deferred financing costs represent commitment fees, loan fees, legal fees and other third-party costs associated with obtaining financing and are presented on the balance sheet as a direct deduction from the carrying value of the associated debt liability. These costs are amortized over the terms of the respective financing agreements using the effective interest method. Unamortized deferred financing costs are generally expensed when the associated debt is refinanced or repaid before maturity unless specific rules are met that would allow for the carryover of such costs to the refinanced debt. Deferred financing costs incurred before an associated debt liability is recognized are included in prepaid and other assets on the balance sheet. Costs incurred in seeking financing transactions that do not close are expensed in the period in which it is determined that the financing will not close. Fair Value Measurements Under GAAP, the Company is required to measure certain financial instruments at fair value on a recurring basis. In addition, the Company is required to measure other non-financial and financial assets at fair value on a non-recurring basis (e.g., carrying value of long-lived assets). Fair value is defined as the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The GAAP fair value framework uses a three-tiered approach. Fair value measurements are classified and disclosed in one of the following three categories: • Level 1: unadjusted quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities; • Level 2: quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and • Level 3: prices or valuation techniques where little or no market data is available that requires inputs that are both significant to the fair value measurement and unobservable. When available, the Company utilizes quoted market prices from independent third-party sources to determine fair value and classifies such items in Level 1 or Level 2. In instances where the market for a financial instrument is not active, regardless of the availability of a nonbinding quoted market price, observable inputs might not be relevant and could require the Company to make a significant adjustment to derive a fair value measurement. Additionally, in an inactive market, a market price quoted from an independent third party may rely more on models with inputs based on information available only to that independent third party. When the Company determines the market for a financial instrument owned by the Company to be illiquid or when market transactions for similar instruments do not appear orderly, the Company uses several valuation sources (including internal valuations, discounted cash flow analysis and quoted market prices) and establishes a fair value by assigning weights to the various valuation sources. Additionally, when determining the fair value of liabilities in circumstances in which a quoted price in an active market for an identical liability is not available, the Company measures fair value using (i) a valuation technique that uses the quoted price of the identical liability when traded as an asset or quoted prices for similar liabilities or similar liabilities when traded as assets or (ii) another valuation technique that is consistent with the principles of fair value measurement, such as the income approach or the market approach. Changes in assumptions or estimation methodologies can have a material effect on these estimated fair values. In this regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, may not be realized in an immediate settlement of the instrument. The Company considers the following factors to be indicators of an inactive market: (i) there are few recent transactions, (ii) price quotations are not based on current information, (iii) price quotations vary substantially either over time or among market makers (for example, some brokered markets), (iv) indexes that previously were highly correlated with the fair values of the asset or liability are demonstrably uncorrelated with recent indications of fair value for that asset or liability, (v) there is a significant increase in implied liquidity risk premiums, yields, or performance indicators (such as delinquency rates or loss severities) for observed transactions or quoted prices when compared with the Company’s estimate of expected cash flows, considering all available market data about credit and other nonperformance risk for the asset or liability, (vi) there is a wide bid-ask spread or significant increase in the bid-ask spread, (vii) there is a significant decline or absence of a market for new issuances (that is, a primary market) for the asset or liability or similar assets or liabilities, and (viii) little information is released publicly (for example, a principal-to-principal market). The Company considers the following factors to be indicators of non-orderly transactions: (i) there was not adequate exposure to the market for a period before the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities under current market conditions, (ii) there was a usual and customary marketing period, but the seller marketed the asset or liability to a single market participant, (iii) the seller is in or near bankruptcy or receivership (that is, distressed), or the seller was required to sell to meet regulatory or legal requirements (that is, forced), and (iv) the transaction price is an outlier when compared with other recent transactions for the same or similar assets or liabilities. Redeemable Common Stock The Company’s share redemption program provides that stockholders may sell their shares to the Company in limited circumstances. Commencing with redemptions in 2019, the Company’s share redemption program is only available for redemptions sought upon a stockholder’s death, “qualifying disability” or “determination of incompetence” (each as defined in the share redemption program, and collectively “special redemptions”). Previously, ordinary redemptions were available under the terms of the Company’s share redemption program. Pursuant to the Company’s share redemption program, as amended to date, there are several limitations on the Company’s ability to redeem shares: • During each calendar year, special redemptions are limited to an annual dollar amount determined by the board of directors, which may be reviewed during the year and increased or decreased upon ten business days’ notice to the Company’s stockholders. The dollar amount limitation for special redemptions for the calendar year 2019 is $1.0 million in the aggregate, as may be reviewed and adjusted from time to time by the board of directors. • During any calendar year, the Company may redeem no more than 5% of the weighted‑average number of shares outstanding during the prior calendar year. • The Company has no obligation to redeem shares if the redemption would violate the restrictions on distributions under Maryland law, which prohibits distributions that would cause a corporation to fail to meet statutory tests of solvency. During 2018, the Company’s ability to redeem shares in connection with a special redemption or ordinary redemption was limited to the number of shares that the Company could purchase with the amount of net proceeds from the sale of shares under its distribution reinvestment plan during the prior calendar year. In addition, except for special redemptions, the Company could not redeem shares unless the stockholder had held his or her shares for one year. Special redemptions are redeemed at a price equal to the most recent estimated NAV per share as of the applicable redemption date. Ordinary redemptions were redeemed at 95.0% of the Company’s most recent estimated NAV per share as of the applicable redemption date. On December 8, 2017, the Company’s board of directors approved an estimated value per share of the Company’s common stock of $8.79 (unaudited) based on the estimated value of the Company’s assets less the estimated value of the Company’s liabilities, divided by the number of shares outstanding, all as of September 30, 2017, with the exception of a reduction to the Company’s net asset value for acquisition and financing costs related to a real estate acquisition subsequent to September 30, 2017. The change in the redemption price was effective for the December 2017 through November 2018 redemption dates. On December 7, 2018, the Company’s board of directors approved an estimated value per share of the Company’s common stock of $9.20 (unaudited) based on the estimated value of the Company’s assets less the estimated value of the Company’s liabilities, divided by the number of shares outstanding, all as of September 30, 2018. The change in the redemption price became effective for the December 2018 redemption date, which was December 31, 2018, and will be effective until the estimated value per share is updated. The Company records amounts that are redeemable under the share redemption program as redeemable common stock liability in its consolidated balance sheets because the shares will be mandatorily redeemable at the option of the holder and therefore their redemption is outside the control of the Company. The maximum amount redeemable under the Company’s share redemption program is limited to the number of shares the Company could redeem with the amount of the net proceeds from the sale of shares under the distribution reinvestment plan during the prior calendar year. However, because the amounts that can be redeemed are determinable and only contingent on an event that is likely to occur (e.g., the passage of time) the Company presents the net proceeds from the current year and prior year distribution reinvestment plan, net of current year redemptions, as redeemable common stock in its consolidated balance sheets. The Company will classify as liabilities financial instruments that represent a mandatory obligation of the Company to redeem shares. The Company’s redeemable common shares are contingently redeemable at the option of the holder. When the Company determines it has a mandatory obligation to repurchase shares under the share redemption program, it will reclassify such obligations from temporary equity to a liability based upon their respective settlement values. Related Party Transactions Pursuant to the Advisory Agreement, the Initial Private Offering Dealer Manager Agreement and the Public Offering Dealer Manager Agreement, the Company is or was obligated to pay the Advisor and the Dealer Manager specified fees upon the provision of certain services related to the Initial Private Offering and the Public Offering, the investment of funds in real estate, management of the Company’s investments and for other services (including, but not limited to, the disposition of investments). The Company was also obligated to reimburse the Advisor and Dealer Manager for certain organization and offering costs incurred by the Advisor and the Dealer Manager on behalf of the Company, and the Company is obligated to reimburse the Advisor for acquisition and origination expenses and certain operating expenses incurred on behalf of the Company or incurred in connection with providing services to the Company. The Advisor is entitled to certain other fees, including an incentive fee upon achieving certain performance goals, as detailed in the Advisory Agreement. See Note 8, “Related Party Transactions.” In addition, the Advisor will pay all offering expenses related to the Second Private Offering without reimbursement by the Company. In addition, in connection with certain property acquisitions, the Company, through indirect wholly owned subsidiaries, has entered into separate property management agreements (each, a “Property Management Agreement”) with KBS Management Group, LLC (the “Co-Manager”), an affiliate of the Advisor. The Company records all related party fees as incurred, subject to any limitations described in the respective agreements. The Company had not incurred any disposition fees, subordinated participation in net cash flows or subordinated incentive fees payable to the Advisor through December 31, 2018 . Selling Commissions and Dealer Manager Fees In the Initial Private Offering, the Company paid the Dealer Manager up to 6.5% of the price per share of Class A common stock sold in the primary portion of the Initial Private Offering as a selling commission. The Dealer Manager reallowed 100% of selling commissions earned to participating broker-dealers. No sales commissions were paid on shares sold through the distribution reinvestment plan. In the Initial Private Offering, the Company paid the Dealer Manager up to 2.0% of the price per share of Class A common stock sold in the primary portion of the Initial Private Offering as a dealer manager fee. No dealer manager fee was payable on shares sold under the distribution reinvestment plan. From its dealer manager fee, the Dealer Manager could reallow to any participating broker-dealer up to 1.0% of the price per share of Class A common stock sold in the Initial Private Offering attributable to that participating broker-dealer as a marketing fee and in special cases the dealer manager could increase the reallowance. In the Public Offering, the Company paid selling commissions to the Dealer Manager in amounts up to 6.5% of the price per share of Class A common stock sold in the primary portion of the Public Offering and up to 3.0% of the price per share of Class T common stock sold in the primary portion of the Public Offering. Additionally, in the Public Offering, the Company paid dealer manager fees to the Dealer Manager in an amount up to 2.0% of the price per share of Class A and Class T common stock sold in the primary portion of the Public Offering. The Dealer Manager reallowed all selling commissions to participating broker dealers and could generally reallow (from its dealer manager fee) to any participating broker dealer up to 1.0% of the gross proceeds from the primary portion of the Public Offering attributable to that participating broker dealer as a marketing fee and in select cases up to 1.5% of the gross proceeds from the primary portion of the Public Offering was reallowed. No selling commissions or dealer manager fees were payable on shares of common stock sold under the distribution reinvestment plan. The Advisor has agreed to pay selling commissions to NCPS of 0.5% of the price per share of Class A common stock sold in the Second Private Offering on behalf of the Company without reimbursement by the Company. Acquisition Fees Through August 8, 2017, the Company paid the Advisor 2.0% of the cost of investments acquired by the Company, including acquisition expenses and any debt attributable to such investments, plus significant capital expenditures budgeted as of the date of acquisition related to the development, construction or improvement of a real estate property. Acquisition fees calculated based on capital expenditures budgeted as of the date of acquisition were paid at the time funds were disbursed pursuant to a final approved budget upon receipt of an invoice by the Company. On August 9, 2017, the Company entered into an amended and restated advisory agreement with the Advisor, which, among other changes, eliminated the payment of acquisition fees to the Advisor. Acquisition Expenses The Company reimburses the Advisor for customary acquisition expenses (including expenses relating to potential investments that the Company does not close), such as legal fees and expenses (including fees of independent contractor in-house counsel that are not employees of the Advisor), costs of due diligence (including, as necessary, updated appraisals, surveys and environmental site assessments), travel and communications expenses, accounting fees and expenses and other closing costs and miscellaneous expenses relating to the acquisition of real estate properties. Stockholder Servicing Fee During the Public Offering, the Company paid the Dealer Manager an annual stockholder servicing fee of

REAL ESTATE

REAL ESTATE	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
REAL ESTATE	REAL ESTATE As of December 31, 2018 , the Company owned four office buildings containing 683,952 rentable square feet, which were collectively 93% occupied. The following table provides summary information regarding the properties owned by the Company as of December 31, 2018 (in thousands): Property Date Acquired City State Property Type Total Real Estate at Cost Accumulated Depreciation and Amortization Total Real Estate, Net Von Karman Tech Center 08/12/2015 Irvine CA Office $ 20,380 $ (1,688 ) $ 18,692 Commonwealth Building 06/30/2016 Portland OR Office 77,262 (7,913 ) 69,349 The Offices at Greenhouse 11/14/2016 Houston TX Office 47,241 (5,163 ) 42,078 Institute Property 11/09/2017 Chicago IL Office 45,868 (2,352 ) 43,516 $ 190,751 $ (17,116 ) $ 173,635 As of December 31, 2018 , the following properties represented more than 10% of the Company’s total assets: Property Location Rentable Square Feet Total Real Estate, Net (in thousands) Percentage of Total Assets Annualized Base Rent (in thousands) (1) Average Annualized Base Rent per sq. ft. Occupancy Von Karman Tech Center Irvine, CA 101,161 $ 18,692 10.1 % $ 2,007 $ 22.63 87.6 % Commonwealth Building Portland, OR 224,122 69,349 37.4 % 5,849 27.10 96.3 % The Offices at Greenhouse Houston, TX 203,284 42,078 22.7 % 4,201 20.66 100.0 % Institute Property Chicago, IL 155,385 43,516 23.4 % 3,306 26.33 80.8 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of December 31, 2018 , adjusted to straight-line any contractual tenant concessions (including free rent), rent increases and rent decreases from the lease’s inception through the balance of the lease term. Operating Leases The Company’s real estate properties are leased to tenants under operating leases for which the terms and expirations vary. As of December 31, 2018 , the leases had remaining terms, excluding options to extend, of up to 8.4 years with a weighted-average remaining term of 4.0 years. Some of the leases have provisions to extend the term of the leases, options for early termination for all or a part of the leased premises after paying a specified penalty, and other terms and conditions as negotiated. The Company retains substantially all of the risks and benefits of ownership of the real estate assets leased to tenants. Generally, upon the execution of a lease, the Company requires a security deposit from the tenant in the form of a cash deposit and/or a letter of credit. The amount required as a security deposit varies depending upon the terms of the respective lease and the creditworthiness of the tenant, but generally is not a significant amount. Therefore, exposure to credit risk exists to the extent that a receivable from a tenant exceeds the amount of its security deposit. Security deposits received in cash related to tenant leases are included in other liabilities in the accompanying consolidated balance sheets and totaled $1.1 million and $1.2 million as of December 31, 2018 and 2017 , respectively. During the years ended December 31, 2018 , 2017 and 2016 , the Company recognized deferred rent from tenants, net of lease incentive amortization, of $1.1 million , $0.9 million , and $0.5 million , respectively. As of December 31, 2018 and 2017 , the cumulative deferred rent balance was $2.9 million and $1.8 million , respectively, and is included in rents and other receivables on the accompanying balance sheets. The cumulative deferred rent balance included $0.2 million and $0.2 million of unamortized lease incentives as of December 31, 2018 and 2017 , respectively. As of December 31, 2018 , the future minimum rental income from the Company’s properties under its non-cancelable operating leases was as follows (in thousands): 2019 $ 14,692 2020 14,853 2021 13,438 2022 11,449 2023 7,957 Thereafter 9,426 $ 71,815 As of December 31, 2018 , the Company had a concentration of credit risk related to AECOM, one of the tenants in The Offices at Greenhouse in the engineering industry, which represented 20% of the Company’s annualized base rent. The tenant individually occupied 140,922 rentable square feet or approximately 21% of the total rentable square feet of the Company’s real estate portfolio. Of the 140,922 rentable square feet, 5,195 rentable square feet expires on July 24, 2019, with two three -year extension options, and 135,727 rentable square feet expires on December 31, 2024 , with two five -year extension options. As of December 31, 2018 , the annualized base rent for this tenant was approximately $3.0 million or $21.39 per square foot. No other tenant represented more than 10% of the Company’s annualized base rent. As of December 31, 2018 , the Company’s real estate properties were leased to 73 tenants over a diverse range of industries. The Company’s highest tenant industry concentration (greater than 10% of annualized base rent) was as follows: Industry Number of Tenants Annualized Base Rent (1) (in thousands) Percentage of Professional, scientific and technical 12 $ 5,866 38.2 % Information technology 9 2,093 13.6 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of December 31, 2018 , adjusted to straight-line any contractual tenant concessions (including free rent), rent increases and rent decreases from the lease’s inception through the balance of the lease term. As of December 31, 2018 , no other tenant industries accounted for more than 10% of annualized base rent. No material tenant credit issues have been identified at this time. During the years ended December 31, 2018 , 2017 and 2016 , the Company recorded bad debt expense of $54,000 , $161,000 and $31,000 , respectively. As of December 31, 2018 , the Company had a bad debt expense reserve of $42,000 , which represented less than 1% of its annualized base rent.

TENANT ORIGINATION AND ABSORPTI

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES	12 Months Ended
	Dec. 31, 2018
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Abstract]
TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES	TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES As of December 31, 2018 and 2017 , the Company’s tenant origination and absorption costs, above-market lease assets and below-market lease liabilities (excluding fully amortized assets and liabilities and accumulated amortization) were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities 2018 2017 2018 2017 2018 2017 Cost $ 15,981 $ 17,047 $ 213 $ 213 $ (7,072 ) $ (7,838 ) Accumulated Amortization (5,848 ) (3,480 ) (63 ) (33 ) 3,204 1,928 Net Amount $ 10,133 $ 13,567 $ 150 $ 180 $ (3,868 ) $ (5,910 ) Increases (decreases) in net income as a result of amortization of the Company’s tenant origination and absorption costs, above-market lease assets and below-market lease liabilities for the years ended December 31, 2018 , 2017 and 2016 were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities For the Years Ended December 31, For the Years Ended December 31, For the Years Ended December 31, 2018 2017 2016 2018 2017 2016 2018 2017 2016 Amortization $ (3,434 ) $ (2,826 ) $ (1,135 ) $ (30 ) $ (30 ) $ (4 ) $ 2,042 $ 1,514 $ 712 The remaining unamortized balance for these outstanding intangible assets and liabilities as of December 31, 2018 is estimated to be amortized for the years ending December 31 as follows (in thousands): Tenant Origination and Above-Market Below-Market 2019 $ (2,589 ) $ (30 ) $ 1,278 2020 (2,224 ) (28 ) 1,032 2021 (1,768 ) (21 ) 596 2022 (1,498 ) (21 ) 450 2023 (962 ) (21 ) 198 Thereafter (1,092 ) (29 ) 314 $ (10,133 ) $ (150 ) $ 3,868 Weighted-Average Remaining Amortization Period 4.9 years 6.0 years 4.2 years

NOTES PAYABLE

NOTES PAYABLE	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
NOTES PAYABLE	NOTES PAYABLE As of December 31, 2018 and 2017 , the Company’s notes payable consisted of the following (dollars in thousands): Book Value as of December 31, 2018 Book Value as of December 31, 2017 Contractual Interest Rate as of December 31, 2018 (1) Effective Interest Rate as of December 31, 2018 (1) Payment Type Maturity Date (2) Commonwealth Building Mortgage Loan (3) $ 45,000 $ 41,000 One-month LIBOR + 1.80% 4.15% Interest Only 02/01/2023 Term Loan (4) 72,800 72,800 One-month LIBOR + 2.00% 4.16% Interest Only 11/09/2020 Notes payable principal outstanding $ 117,800 $ 113,800 Deferred financing costs, net (967 ) (1,020 ) Notes payable, net $ 116,833 $ 112,780 _____________________ (1) Contractual interest rate represents the interest rate in effect under the loan as of December 31, 2018 . Effective interest rate is calculated as the actual interest rate in effect as of December 31, 2018 (consisting of the contractual interest rate and the effect of interest rate swaps, if applicable), using interest rate indices as of December 31, 2018 , where applicable. (2) Represents the maturity date as of December 31, 2018 ; subject to certain conditions, the maturity dates of certain loans may be extended beyond the dates shown. (3) On January 18, 2018, the Company, through an indirect wholly owned subsidiary, closed the refinancing of the initial Commonwealth Building mortgage loan with an unaffiliated lender (the “Refinancing”) for a maximum loan amount of up to $51.4 million . With the proceeds from the Refinancing, the Company repaid $41.0 million of principal in satisfaction of the initial Commonwealth Building mortgage loan. Under the Refinancing, monthly payments are interest-only with the remaining principal balance, all accrued and unpaid interest and all other sums due under the loan documents payable at maturity. If the LIBOR rate is equal to or greater than 2.90% for five consecutive business days, the Company has 30 days to enter into an interest rate cap agreement with a LIBOR strike rate of 3.90% or less. The Company has the right to prepay all or a portion of the loan under the Refinancing commencing on February 1, 2019, subject to certain fees and conditions contained in the loan documents. As of December 31, 2018 , there are two one -year extension options remaining on the Commonwealth Building Mortgage Loan. As of December 31, 2018 , $45.0 million of the Commonwealth Building mortgage loan was outstanding and $6.4 million remained available for future disbursements, subject to certain terms and conditions set forth in the loan documents. (4) As of December 31, 2018 , the outstanding balance under the Term Loan consisted of $48.5 million of term commitment and $24.3 million of revolving commitment, which bears interest at a rate per annum equal to 2.0% over one-month LIBOR. As of December 31, 2018 , there are two one -year extension options remaining on the Term Loan. The Term Loan was secured by The Offices at Greenhouse, Von Karman Tech Center and Institute Property. During the years ended December 31, 2018 , 2017 and 2016 , the Company incurred $5.3 million , $3.3 million and $1.2 million of interest expense. As of December 31, 2018 and 2017 , $0.4 million and $0.3 million of interest expense were payable, respectively. Included in interest expense for the years ended December 31, 2018 , 2017 and 2016 were $0.3 million , $0.7 million and $0.2 million of amortization of deferred financing costs, respectively. Also included in interest expense during the year ended December 31, 2018 was $0.2 million of debt refinancing costs. Interest expense increased by $0.1 million and reduced by $0.2 million as a result of a change in fair value of the Company’s derivative instruments for the years ended December 31, 2018 and 2017 , respectively. The following is a schedule of maturities, including principal amortization payments, for all notes payable outstanding as of December 31, 2018 (in thousands): 2019 $ — 2020 72,800 2021 — 2022 — 2023 45,000 Thereafter — $ 117,800

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS	DERIVATIVE INSTRUMENTS The Company enters into derivative instruments for risk management purposes to hedge its exposure to cash flow variability caused by changing interest rates. The primary goal of the Company’s risk management practices related to interest rate risk is to prevent changes in interest rates from adversely impacting the Company’s ability to achieve its investment return objectives. The Company does not enter into derivatives for speculative purposes. The Company enters into interest rate swaps as a fixed rate payer to mitigate its exposure to rising interest rates on its variable rate notes payable. The value of interest rate swaps is primarily impacted by interest rates, market expectations about interest rates, and the remaining life of the instrument. In general, increases in interest rates, or anticipated increases in interest rates, will increase the value of the fixed rate payer position and decrease the value of the variable rate payer position. As the remaining life of the interest rate swap decreases, the value of both positions will generally move towards zero. The following table summarizes the notional amount and other information related to the Company’s interest rate swaps as of December 31, 2018 and 2017 . The notional amount is an indication of the extent of the Company’s involvement in each instrument at that time, but does not represent exposure to credit, interest rate or market risks (dollars in thousands): December 31, 2018 December 31, 2017 Weighted-Average Fix Pay Rate Weighted-Average Remaining Term in Years Derivative Instruments Number of Instruments Notional Amount Number of Instruments Notional Amount Reference Rate as of December 31, 2018 Derivative instruments not designated as hedging instruments Interest Rate Swaps (1) 2 $ 78,533 1 $ 48,533 One-month LIBOR/ 2.36% 3.22 _____________________ (1) Includes a forward interest rate swap in the amount of $30.0 million , which will become effective on April 1, 2019 and maturing on November 1, 2022. The following table sets forth the fair value of the Company’s derivative instruments as well as their classification on the consolidated balance sheets as of December 31, 2018 and 2017 (dollars in thousands): December 31, 2018 December 31, 2017 Derivative Instruments Balance Sheet Location Number of Fair Value Number of Fair Value Derivative instruments not designated as hedging instruments Interest Rate Swaps Prepaid expenses and other assets, at fair value 1 $ 501 1 $ 178 Interest Rate Swaps Other liabilities, at fair value 1 $ (409 ) — $ — The change in fair value of a derivative instrument that is not designated as a cash flow hedge is included in interest expense in the accompanying consolidated statements of operations. The following table summarizes the effects of derivative instruments on the Company’s consolidated statements of operations (in thousands): For the Years Ended December 31, 2018 2017 2016 Income statement related Derivatives not designated as hedging instruments Realized gain recognized on interest rate swaps $ (21 ) $ — $ — Unrealized loss (gain) on interest rate swaps 86 (178 ) — Increase (decrease) in interest expense as a result of derivatives $ 65 $ (178 ) $ —

FAIR VALUE DISCLOSURES

FAIR VALUE DISCLOSURES	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
FAIR VALUE DISCLOSURES	FAIR VALUE DISCLOSURES Under GAAP, the Company is required to measure certain financial instruments at fair value on a recurring basis. In addition, the Company is required to measure other non-financial and financial assets at fair value on a non-recurring basis (e.g., carrying value of long-lived assets). Fair value, as defined under GAAP, is the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The GAAP fair value framework uses a three-tiered approach. Fair value measurements are classified and disclosed in one of the following three categories: • Level 1: unadjusted quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities; • Level 2: quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and • Level 3: prices or valuation techniques where little or no market data is available that requires inputs that are both significant to the fair value measurement and unobservable. The fair value for certain financial instruments is derived using a combination of market quotes, pricing models and other valuation techniques that involve significant management judgment. The price transparency of financial instruments is a key determinant of the degree of judgment involved in determining the fair value of the Company’s financial instruments. Financial instruments for which actively quoted prices or pricing parameters are available and for which markets contain orderly transactions will generally have a higher degree of price transparency than financial instruments for which markets are inactive or consist of non-orderly trades. The Company evaluates several factors when determining if a market is inactive or when market transactions are not orderly. The following is a summary of the methods and assumptions used by management in estimating the fair value of each class of financial instrument for which it is practicable to estimate the fair value: Cash and cash equivalents, rent and other receivables, and accounts payable and accrued liabilities: These balances approximate their fair values due to the short maturities of these items. Derivative instruments: The Company’s derivative instruments are presented at fair value on the accompanying consolidated balance sheets. The valuation of these instruments is determined using a proprietary model that utilizes observable inputs. As such, the Company classifies these inputs as Level 2 inputs. The proprietary model uses the contractual terms of the derivatives, including the period to maturity, as well as observable market-based inputs, including interest rate curves and volatility. The fair values of interest rate swaps are estimated using the market standard methodology of netting the discounted fixed cash payments and the discounted expected variable cash receipts. The variable cash receipts are based on an expectation of interest rates (forward curves) derived from observable market interest rate curves. In addition, credit valuation adjustments, which consider the impact of any credit risks to the contracts, are incorporated in the fair values to account for potential nonperformance risk. Notes payable: The fair value of the Company’s notes payable is estimated using a discounted cash flow analysis based on management’s estimates of current market interest rates for instruments with similar characteristics, including remaining loan term, loan-to-value ratio, type of collateral and other credit enhancements. Additionally, when determining the fair value of liabilities in circumstances in which a quoted price in an active market for an identical liability is not available, the Company measures fair value using (i) a valuation technique that uses the quoted price of the identical liability when traded as an asset or quoted prices for similar liabilities when traded as assets or (ii) another valuation technique that is consistent with the principles of fair value measurement, such as the income approach or the market approach. The Company classifies these inputs as Level 3 inputs. The following were the face values, carrying amounts and fair values of the Company’s notes payable as of December 31, 2018 and 2017 , which carrying amounts generally do not approximate the fair values (in thousands): December 31, 2018 December 31, 2017 Face Value Carrying Amount Fair Value Face Value Carrying Amount Fair Value Financial liabilities: Notes payable $ 117,800 $ 116,833 $ 118,911 $ 113,800 $ 112,780 $ 114,327 Disclosure of the fair values of financial instruments is based on pertinent information available to the Company as of the period end and requires a significant amount of judgment. The actual value could be materially different from the Company’s estimate of value. As of December 31, 2018 , the Company measured the following derivative instruments at fair value (in thousands): Fair Value Measurements Using Total Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring Basis: Asset derivative - interest rate swap $ 501 $ — $ 501 $ — Liability derivative - interest rate swap (409 ) — (409 ) —

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS Pursuant to the Advisory Agreement, the Initial Private Offering Dealer Manager Agreement and the Public Offering Dealer Manager Agreement, the Company is or was obligated to pay the Advisor and the Dealer Manager specified fees upon the provision of certain services related to the Initial Private Offering and the Public Offering, the investment of funds in real estate, management of the Company’s investments and for other services (including, but not limited to, the disposition of investments). The Company was also obligated to reimburse the Advisor and Dealer Manager for certain organization and offering costs incurred by the Advisor and the Dealer Manager on behalf of the Company, and the Company is obligated to reimburse the Advisor for acquisition and origination expenses and certain operating expenses incurred on behalf of the Company or incurred in connection with providing services to the Company. The Advisor is entitled to certain other fees, including an incentive fee upon achieving certain performance goals, as detailed in the Advisory Agreement. In addition, the Advisor will pay all offering expenses related to the Second Private Offering without reimbursement by the Company. In addition, in connection with certain property acquisitions, the Company, through indirect wholly owned subsidiaries, has entered into separate Property Management Agreements (defined below) with KBS Management Group, LLC, an affiliate of the Advisor (the “Co-Manager”). The Company has also entered into a fee reimbursement agreement with the Dealer Manager pursuant to which the Company agreed to reimburse the Dealer Manager for certain fees and expenses it incurs for administering the Company’s participation in the DTCC Alternative Investment Product Platform with respect to certain accounts of the Company’s investors serviced through the platform. The Advisor also serves or served as the advisor for KBS Real Estate Investment Trust I, Inc. (“KBS REIT I”), KBS Real Estate Investment Trust II, Inc. (“KBS REIT II”), KBS Real Estate Investment Trust III, Inc. (“KBS REIT III”), KBS Strategic Opportunity REIT, Inc. (“KBS Strategic Opportunity REIT”), KBS Legacy Partners Apartment REIT, Inc. (“KBS Legacy Partners Apartment REIT”) and KBS Strategic Opportunity REIT II, Inc. (“KBS Strategic Opportunity REIT II”). The Dealer Manager also serves or served as the dealer manager for KBS REIT I, KBS REIT II, KBS REIT III, KBS Strategic Opportunity REIT, KBS Legacy Partners Apartment REIT and KBS Strategic Opportunity REIT II. The Company, together with KBS REIT I, KBS REIT II, KBS REIT III, KBS Strategic Opportunity REIT, KBS Legacy Partners Apartment REIT, KBS Strategic Opportunity REIT II, the Dealer Manager, the Advisor and other KBS affiliated entities, entered into an errors and omissions and directors and officers liability insurance program where the lower tiers of such insurance coverage are shared. The cost of these lower tiers is allocated by the Advisor and its insurance broker among each of the various entities covered by the program and is billed directly to each entity. In June 2018, the Company renewed its participation in the program. At renewal, KBS Strategic Opportunity REIT, KBS Strategic Opportunity REIT II and KBS Legacy Partners Apartment REIT elected to cease participation in the program and obtain separate insurance coverage. The program is effective through June 30, 2019. KBS REIT I elected to cease participation in the program at the June 2017 renewal and obtained separate insurance coverage. During the years ended December 31, 2018 , 2017 and 2016 , no other business transactions occurred between the Company and KBS REIT I, KBS REIT II, KBS REIT III, KBS Strategic Opportunity REIT, KBS Legacy Partners Apartment REIT and KBS Strategic Opportunity REIT II. Pursuant to the terms of these agreements, summarized below are the related-party costs incurred by the Company for the years ended December 31, 2018 , 2017 and 2016 , respectively, and any related amounts payable as of December 31, 2018 and 2017 (in thousands): Incurred Years Ended December 31, Payable as of December 31, 2018 2017 2016 2018 2017 Expensed Asset management fees (1) $ 1,855 $ 632 $ 399 $ 2,274 $ 418 Reimbursement of operating expenses (2) 197 185 151 16 18 Property management fees (3) 170 124 68 13 13 Real estate acquisition fees (4) — — 2,316 — — Other Arrangement Advisor advance for cash distributions (5) — — 1,139 1,338 1,338 Additional Paid-in Capital Selling commissions — 78 3,029 — — Dealer manager fees — 51 1,134 — — Stockholder servicing fees (6) — (26 ) 37 — — Reimbursable other offering costs (7) — 14 392 — — $ 2,222 $ 1,058 $ 8,665 $ 3,641 $ 1,787 _____________________ (1) Through August 8, 2017 , the asset management fee payable to the Advisor was a monthly fee equal to one-twelfth of 1.6% of the cost of the Company’s investments, less any debt secured by or attributable to the investments. Beginning on August 9, 2017, the asset management fee is a monthly fee payable to the Advisor in an amount equal to one-twelfth of 1.0% of the cost of the Company’s investments including the portion of the investment that is debt financed. As of December 31, 2018 , the Company had accrued and deferred payment of $2.3 million of asset management fees related to October 2017 through December 2018. (2) See “Reimbursable Operating Expenses” below. (3) See “Real Estate Property Co-Management Agreements” below. (4) On August 9, 2017, the Company entered into an amended and restated advisory agreement with the Advisor in which the Advisor will no longer be paid an acquisition fee in connection with acquisitions on or after August 9, 2017. (5) See “Advance from the Advisor” below. (6) The Public Offering was terminated effective June 30, 2017. Pursuant to the terms of the Class T shares as set forth in the Articles Supplementary and Multiple Class Plan of the Company, the Company ceased accruing for stockholder servicing fees after June 30, 2017 and reversed the amounts previously accrued. (7) See “Organization and Offering Costs” below. During the years ended December 31, 2018 , 2017 and 2016 , the Advisor reimbursed the Company $10,655 , $8,932 and $3,670 for property insurance rebates. Reimbursable Operating Expenses Reimbursable operating expenses primarily related to directors and officers liability insurance, legal fees, state and local taxes, accounting software and cybersecurity related expenses incurred by the Advisor under the Advisory Agreement. The Company has reimbursed the Advisor for the Company’s allocable portion of the salaries, benefits and overhead of internal audit department personnel providing services to the Company. These amounts totaled $0.2 million , $0.2 million and $0.1 million for the years ended December 31, 2018 , 2017 and 2016 , respectively, and were the only type of employee costs reimbursed under the Advisory Agreement for the years ended December 31, 2018 , 2017 and 2016 , respectively. The Company does not reimburse for employee costs in connection with services for which the Advisor earned or earns acquisition, origination or disposition fees (other than reimbursement of travel and communication expenses) or for the salaries or benefits the Advisor or its affiliates may pay to the Company’s executive officers. In addition to the amounts above, the Company reimburses the Advisor for certain of the Company’s direct costs incurred from third parties that were initially paid by the Advisor on behalf of the Company. Effective September 29, 2017, the Company eliminated its obligation to reimburse expenses incurred by the Advisor in connection with providing services pursuant to the Advisory Agreement, other than (i) the allocable portion of the costs of the internal audit department and (ii) promotional costs and expenses related to the leasing of properties. Commencing with the quarter ended December 31, 2016, the Advisor must reimburse the Company the amount by which the Company’s aggregate total operating expenses for the four fiscal quarters then ended exceed the greater of 2% of the Company’s average invested assets or 25% of the Company’s net income, unless the conflicts committee has determined that such excess expenses were justified based on unusual and non-recurring factors. Operating expenses for the four fiscal quarters ended December 31, 2018 did not exceed the charter-imposed limitation. Advance from the Advisor The Advisor advanced funds to the Company, which are non-interest bearing, for distribution record dates through the period ended May 31, 2016. As of December 31, 2018 , the total advanced funds due to the Advisor from the Company was approximately $1.3 million . The Company is only obligated to repay the Advisor for its advance if and to the extent that: (i) the Company’s modified funds from operations (“MFFO”), as such term is defined by the Institute for Portfolio Alternatives and interpreted by the Company, for the immediately preceding month exceeds the amount of cash distributions declared for record dates of such prior month (an “MFFO Surplus”), and the Company will pay the Advisor the amount of the MFFO Surplus to reduce the principal amount outstanding under the advance, provided that such payments shall only be made if management in its sole discretion expects an MFFO Surplus to be recurring for at least the next two calendar quarters, determined on a quarterly basis; or (ii) Excess proceeds from third-party financings are available (“Excess Proceeds”), provided that the amount of any such Excess Proceeds that may be used to repay the principal amount outstanding under the advance shall be determined by the conflicts committee in its sole discretion. In determining whether Excess Proceeds are available to repay the advance, the Company’s conflicts committee will consider whether cash on hand could have been used to reduce the amount of third-party financing provided to us. If such cash could have been used instead of third-party financing, the third-party financing proceeds will be available to repay the advance. Real Estate Property Co-Management Agreements In connection with its property acquisitions, the Company, through separate, indirect, wholly-owned subsidiaries, entered into separate property management agreements (each, a “Property Management Agreement”) with the Co-Manager for each of its properties. Under each Property Management Agreement, the Co-Manager will provide certain management services related to these properties in addition to those provided by the third-party property managers. In exchange for these services, the Company will pay the Co-Manager a monthly fee equal to a percentage of the rent, payable and actually collected for the month from each of the properties. Each Property Management Agreement has an initial term of one year and will be deemed renewed for successive one -year periods provided it is not terminated. Each party may terminate the Property Management Agreement without cause on 30 days’ written notice to the other party and may terminate each Property Management Agreement for cause on 5 days’ written notice to the other party upon the occurrence of certain events as detailed in each Property Management Agreement. Property Name Effective Date Annual Fee Percentage Von Karman Tech Center 07/31/2015 1.50% Commonwealth Building 07/01/2016 1.25% The Offices at Greenhouse 11/14/2016 0.25% Institute Property 11/09/2017 1.00% Organization and Offering Costs Offering costs include all expenses incurred in connection with the offerings of securities by the Company. Organization costs include all expenses incurred in connection with the formation of the Company, including but not limited to legal fees and other costs to incorporate the Company. With respect to the Public Offering, the Advisor and the Dealer Manager generally paid the organization and offering expenses of the Company incurred in the Primary Offering (other than selling commissions, dealer manager fees and stockholder servicing fees) directly. The Company reimbursed the Advisor, the Dealer Manager and its affiliates up to 1% of gross proceeds raised in the Primary Offering for commercially reasonable organization and offering expenses (other than selling commissions, dealer manager fees and stockholder servicing fees). The Advisor, the Dealer Manager and their affiliates were responsible for all organization and other offering expenses (which excludes selling commissions, dealer manager fees and stockholder servicing fees) paid related to the Primary Offering to the extent they exceeded 1% of gross proceeds raised in the Primary Offering. The Company did not reimburse the Dealer Manager for wholesaling compensation expenses. During the Initial Private Offering, the Company was obligated to reimburse the Advisor and its affiliates for all organization and offering costs (excluding wholesaling compensation expenses) paid by them on behalf of the Company. The Advisor has agreed to pay directly all offering expenses related to the Second Private Offering without reimbursement by the Company. Through December 31, 2018 , the Advisor and its affiliates had incurred organization and other offering costs (which exclude selling commissions, dealer manager fees and stockholder servicing fees) on the Company’s behalf in connection with the Public Offering of approximately $4.4 million . As of December 31, 2018 , the Company had recorded $39,358 of organization and other offering expenses related to the Public Offering, which amount represent the Company’s maximum liability for organization and other offering costs as of December 31, 2018 based on the limitations described above. As of December 31, 2018 , the Company had recorded $1.5 million of organization and other offering costs related to the Initial Private Offering. Organization costs were expensed as incurred and offering costs are deferred and charged to stockholders’ equity as such amounts were reimbursed to the Advisor, the Dealer Manager or their affiliates from the gross proceeds of the applicable offering. As of December 31, 2018 , the Advisor had incurred $4.3 million in offering expenses related to the Second Private Offering.

SELECTED QUARTERLY FINANCIAL DA

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2018 and 2017 (in thousands, except per share amounts): 2018 First Quarter Second Quarter Third Quarter Fourth Quarter Revenues $ 5,581 $ 5,729 $ 5,561 $ 5,309 Class A Common Stock: Net loss (199 ) (703 ) (290 ) (2,300 ) Net loss per common share, basic and diluted (0.02 ) (0.08 ) (0.03 ) (0.25 ) Distributions declared per common share (1) 0.119 0.128 0.133 0.133 Class T Common Stock: Net loss (6 ) (22 ) (9 ) (72 ) Net loss per common share, basic and diluted (0.02 ) (0.08 ) (0.03 ) (0.25 ) Distributions declared per common share (1) 0.119 0.128 0.133 0.133 2017 First Quarter Second Quarter Third Quarter Fourth Quarter Revenues $ 4,033 $ 4,187 $ 4,028 $ 4,713 Class A Common Stock: Net loss (190 ) (406 ) (760 ) (775 ) Net loss per common share, basic and diluted (0.02 ) (0.04 ) (0.08 ) (0.08 ) Distributions declared per common share (1) 0.123 0.125 0.124 0.121 Class T Common Stock: Net loss (7 ) (18 ) (23 ) (20 ) Net loss per common share, basic and diluted (0.05 ) (0.07 ) (0.08 ) (0.08 ) Distributions declared per common share 0.099 0.100 0.124 0.121 __________________ (1) Distributions declared per common share assumes each share was issued and outstanding each day for the periods presented. Distributions for the periods from January 1, 2017 through August 31, 2017 were based on daily record dates and were calculated based on stockholders of record each day during this period at a rate of (i) $0.00136986 per share per day, less (ii) the applicable daily class-specific stockholder servicing fees accrued for and allocable to any class of common stock, divided by the number of shares of common stock of such class outstanding as of the close of business on each respective record date. Distributions for the period from September 1, 2017 through December 31, 2017 were based on daily record dates and were calculated based on stockholders of record each day during this period at a rate of $0.00131849 per share per day. Distributions for the period from January 1, 2018 through April 30, 2018 and from May 1, 2018 through December 31, 2018 were were based on daily record dates and were calculated based on stockholders of record each day during these periods at a rate of $0.00132452 per share per day and $0.00144493 per share per day, respectively.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Economic Dependency The Company depends on the Advisor for certain services that are essential to the Company, including the identification, evaluation, negotiation, acquisition and disposition of investments; management of the daily operations of the Company’s investment portfolio; and other general and administrative responsibilities. In the event that the Advisor is unable to provide such services, the Company will be required to obtain such services from other sources. Legal Matters From time to time, the Company may become party to legal proceedings that arise in the ordinary course of its business. Management is not aware of any legal proceedings of which the outcome is probable or reasonably possible to have a material adverse effect on the Company’s results of operations or financial condition, which would require accrual or disclosure of the contingency and possible range of loss. Additionally, the Company has not recorded any loss contingencies related to legal proceedings in which the potential loss is deemed to be remote. Environmental As an owner of real estate, the Company is subject to various environmental laws of federal, state and local governments. Although there can be no assurance, the Company is not aware of any environmental liability that could have a material adverse effect on its financial condition or results of operations. However, changes in applicable environmental laws and regulations, the uses and conditions of properties in the vicinity of the Company’s property, the activities of its tenants and other environmental conditions of which the Company is unaware with respect to the property could result in future environmental liabilities.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS The Company evaluates subsequent events up until the date the consolidated financial statements are issued. Cash Distributions Paid On January 2, 2019 , the Company paid distributions of $0.4 million , which related to cash distributions on the Company’s common stock, declared for daily record dates for each day in the period from December 1, 2018 through December 31, 2018. On February 4, 2019 , the Company paid cash distributions of $0.5 million , which related to cash distributions on the Company’s common stock, declared for daily record dates for each day in the period from January 1, 2019 through January 31, 2019. On March 1, 2019 , the Company paid distributions of $0.4 million , which related to cash distributions on the Company’s common stock, declared for daily record dates for each day in the period from February 1, 2019 through February 28, 2019. Distributions Authorized On January 23, 2019 , the Company’s board of directors authorized cash distributions on the outstanding shares of all classes of the Company’s common stock based on daily record dates for the period from February 1, 2019 through February 28, 2019, which the Company paid on March 1, 2019, and distributions based on daily record dates for the period from March 1, 2019 through March 31, 2019, which the Company expects to pay in April 2019. On March 6, 2019 , the Company’s board of directors authorized cash distributions on the outstanding shares of all classes of the Company’s common stock based on daily record dates for the period from April 1, 2019 through April 30, 2019 and May 1, 2019 through May 31, 2019, which the Company expects to pay in May 2019 and June 2019, respectively. Investors may choose to receive cash distributions or purchase additional shares through the Company’s distribution reinvestment plan. Distributions for these periods will be calculated based on stockholders of record each day during these periods at a rate of $0.00151233 per share per day.

SCHEDULE III REAL ESTATE ASSETS

SCHEDULE III REAL ESTATE ASSETS AND ACCUMULATED DEPRECIATION AND AMORTIZATION	12 Months Ended
	Dec. 31, 2018
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
SCHEDULE III REAL ESTATE ASSETS AND ACCUMULATED DEPRECIATION AND AMORTIZATION	Initial Cost to Company Gross Amount at which Carried at Close of Period Description Location Ownership Percent Encumbrances Land Building and Improvements (1) Total Cost Capitalized Subsequent to Acquisition (2) Land Building and Improvements (1) Total (3) Accumulated Depreciation and Amortization Original Date of Construction Date Acquired Von Karman Tech Center Irvine, CA 100% (4) $ 10,600 $ 10,799 $ 21,399 $ (1,019 ) $ 10,600 $ 9,780 $ 20,380 $ (1,688 ) 1980 08/12/2015 Commonwealth Building Portland, OR 100% $ 45,000 7,300 66,544 73,844 3,418 7,300 69,962 77,262 (7,913 ) 1948 06/30/2016 The Offices at Greenhouse Houston, TX 100% (4) 5,009 41,595 46,604 637 5,009 42,232 47,241 (5,163 ) 2014 11/14/2016 Institute Property Chicago, IL 100% (4) 8,400 37,654 46,054 (186 ) 8,400 37,468 45,868 (2,352 ) 1908 11/09/2017 TOTAL $ 31,309 $ 156,592 $ 187,901 $ 2,850 $ 31,309 $ 159,442 $ 190,751 $ (17,116 ) ____________________ (1) Building and improvements includes tenant origination and absorption costs. (2) Costs capitalized subsequent to acquisition is net of write-offs of fully depreciated/amortized assets. (3) The aggregate cost of real estate for federal income tax purposes was $189.4 million (unaudited) as of December 31, 2018 . (4) As of December 31, 2018 , these properties served as the security for the Term Loan, which had an outstanding principal balance of $72.8 million as of December 31, 2018 . 2018 2017 2016 Real Estate: Balance at the beginning of the year $ 190,756 $ 141,872 $ 21,421 Acquisitions — 46,054 120,448 Improvements 1,921 4,096 185 Write off of fully depreciated and fully amortized assets (1,926 ) (1,266 ) (48 ) Loss due to property damage — — (134 ) Balance at the end of the year $ 190,751 $ 190,756 $ 141,872 Accumulated depreciation and amortization: Balance at the beginning of the year $ 9,627 $ 3,292 $ 341 Depreciation and amortization expense 9,415 7,601 2,999 Write off of fully depreciated and fully amortized assets (1,926 ) (1,266 ) (48 ) Balance at the end of the year $ 17,116 $ 9,627 $ 3,292

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	The consolidated financial statements include the accounts of the Company, REIT Holdings, and the Operating Partnership and their direct and indirect wholly owned subsidiaries. All significant intercompany balances and transactions are eliminated in consolidation.
Principles of Consolidation	The accompanying consolidated financial statements and notes thereto have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) as contained within the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and the rules and regulations of the SEC.
Use of Estimates	The preparation of the consolidated financial statements and the accompanying notes thereto in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could materially differ from those estimates.
Revenue Recognition, Real Estate	The Company recognizes minimum rent, including rental abatements, lease incentives and contractual fixed increases attributable to operating leases, on a straight-line basis over the term of the related leases when collectibility is reasonably assured and records amounts expected to be received in later years as deferred rent receivable. If the lease provides for tenant improvements, the Company determines whether the tenant improvements, for accounting purposes, are owned by the tenant or the Company. When the Company is the owner of the tenant improvements, the tenant is not considered to have taken physical possession or have control of the physical use of the leased asset until the tenant improvements are substantially completed. When the tenant is the owner of the tenant improvements, any tenant improvement allowance (including amounts that the tenant can take in the form of cash or a credit against its rent) that is funded is treated as a lease incentive and amortized as a reduction of revenue over the lease term. Tenant improvement ownership is determined based on various factors including, but not limited to: • whether the lease stipulates how a tenant improvement allowance may be spent; • whether the amount of a tenant improvement allowance is in excess of market rates; • whether the tenant or landlord retains legal title to the improvements at the end of the lease term; • whether the tenant improvements are unique to the tenant or general-purpose in nature; and • whether the tenant improvements are expected to have any residual value at the end of the lease. The Company records property operating expense reimbursements due from tenants for common area maintenance, real estate taxes, and other recoverable costs in the period the related expenses are incurred. The Company makes estimates of the collectibility of its tenant receivables related to base rents, including deferred rent receivable, expense reimbursements and other revenue or income. Management specifically analyzes accounts receivable, deferred rent receivable, historical bad debts, customer creditworthiness, current economic trends and changes in customer payment terms when evaluating the adequacy of the allowance for doubtful accounts. In addition, with respect to tenants in bankruptcy, management makes estimates of the expected recovery of pre-petition and post-petition claims in assessing the estimated collectibility of the related receivable. In some cases, the ultimate resolution of these claims can exceed one year. When a tenant is in bankruptcy, the Company will record a bad debt reserve for the tenant’s receivable balance and generally will not recognize subsequent rental revenue until cash is received or until the tenant is no longer in bankruptcy and has the ability to make rental payments.
Revenue Recognition, Cash and Cash Equivalents	The Company recognizes interest income on its cash and cash equivalents as it is earned and classifies such amounts as other interest income.
Real Estate, Depreciation and Amortization	Real estate costs related to the acquisition and improvement of properties are capitalized and amortized over the expected useful life of the asset on a straight-line basis. Repair and maintenance costs are charged to expense as incurred and significant replacements and betterments are capitalized. Repair and maintenance costs include all costs that do not extend the useful life of the real estate asset. The Company considers the period of future benefit of an asset to determine its appropriate useful life. Expenditures for tenant improvements are capitalized and amortized over the shorter of the tenant’s lease term or expected useful life.
Real Estate, Real Estate Acquisition Valuation	As a result of the Company’s early adoption of ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business , acquisitions of real estate beginning January 1, 2017 could qualify as asset acquisitions (as opposed to business combinations). The Company records the acquisition of income-producing real estate or real estate that will be used for the production of income as a business combination or an asset acquisition. If substantially all of the fair value of the gross assets acquired are concentrated in a single identifiable asset or group of similar identifiable assets, then the set is not a business. For purposes of this test, land and buildings can be combined along with the intangible assets for any in-place leases and accordingly, most acquisitions of investment properties would not meet the definition of a business and would be accounted for as an asset acquisition. To be considered a business, a set must include an input and a substantive process that together significantly contributes to the ability to create an output. All assets acquired and liabilities assumed in a business combination are measured at their acquisition-date fair values. For asset acquisitions, the cost of the acquisition is allocated to individual assets and liabilities on a relative fair value basis. Acquisition costs associated with business combinations are expensed as incurred. Acquisition costs associated with asset acquisitions are capitalized. The Company assesses the acquisition date fair values of all tangible assets, identifiable intangibles and assumed liabilities using methods similar to those used by independent appraisers, generally utilizing a discounted cash flow analysis that applies appropriate discount and/or capitalization rates and available market information. Estimates of future cash flows are based on a number of factors, including historical operating results, known and anticipated trends, and market and economic conditions. The fair value of tangible assets of an acquired property considers the value of the property as if it were vacant. The Company records above-market and below-market in-place lease values for acquired properties based on the present value (using a discount rate that reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) management’s estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of above-market in-place leases and for the initial term plus any extended term for any leases with below-market renewal options. The Company amortizes any recorded above-market or below-market lease values as a reduction or increase, respectively, to rental income over the remaining non-cancelable terms of the respective lease, including any below-market renewal periods. The Company estimates the value of tenant origination and absorption costs by considering the estimated carrying costs during hypothetical expected lease up periods, considering current market conditions. In estimating carrying costs, the Company includes real estate taxes, insurance and other operating expenses and estimates of lost rentals at market rates during the expected lease up periods. The Company amortizes the value of tenant origination and absorption costs to depreciation and amortization expense over the remaining non-cancelable term of the leases. Estimates of the fair values of the tangible assets, identifiable intangibles and assumed liabilities require the Company to make significant assumptions to estimate market lease rates, property-operating expenses, carrying costs during lease-up periods, discount rates, market absorption periods, and the number of years the property will be held for investment.
Real Estate, Impairments of Real Estate and Related Intangible Assets and Liabilities	The Company continually monitors events and changes in circumstances that could indicate that the carrying amounts of its real estate and related intangible assets and liabilities may not be recoverable or realized. When indicators of potential impairment suggest that the carrying value of real estate and related intangible assets and liabilities may not be recoverable, the Company assesses the recoverability by estimating whether the Company will recover the carrying value of the real estate and related intangible assets and liabilities through its undiscounted future cash flows and its eventual disposition. If, based on this analysis, the Company does not believe that it will be able to recover the carrying value of the real estate and related intangible assets and liabilities, the Company would record an impairment loss to the extent that the carrying value exceeds the estimated fair value of the real estate and related intangible assets and liabilities.
Cash and Cash Equivalents	The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents. Cash equivalents may include cash and short-term investments. Cash and cash equivalents are stated at cost, which approximates fair value. The Company’s cash and cash equivalents balance exceeds federally insurable limits as of December 31, 2018 . The Company intends to mitigate this risk by depositing funds with a major financial institution; however, these cash balances could be impacted if the underlying financial institutions fail or are subject to other adverse conditions in the financial markets. There were no restrictions on the use of the Company’s cash and cash equivalents as of December 31, 2018 .
Rents and Other Receivables	The Company periodically evaluates the collectibility of amounts due from tenants and maintains an allowance for doubtful accounts for estimated losses resulting from the inability of tenants to make required payments under lease agreements. In addition, the Company maintains an allowance for deferred rent receivable that arises from the straight-lining of rents. The Company exercises judgment in establishing these allowances and considers payment history and current credit status of its tenants in developing these estimates.
Derivative Instruments	The Company enters into derivative instruments for risk management purposes to hedge its exposure to cash flow variability caused by changing interest rates on its variable rate notes payable. The Company records these derivative instruments at fair value on the accompanying consolidated balance sheets. Derivative instruments designated and qualifying as a hedge of the exposure to variability in expected future cash flows or other types of forecasted transactions are considered cash flow hedges. The change in fair value of the effective portion of a derivative instrument that is designated as a cash flow hedge is recorded as other comprehensive income (loss) on the accompanying consolidated statements of comprehensive income (loss) and consolidated statements of stockholders’ equity. The changes in fair value for derivative instruments that are not designated as a hedge or that do not meet the hedge accounting criteria are recorded as gain or loss on derivative instruments and included in interest expense as presented in the accompanying consolidated statements of operations. For those instruments designated as cash flow hedges, the Company formally documents all relationships between hedging instruments and hedged items, as well as its risk-management objectives and strategy for undertaking various hedge transactions. This process includes designating all derivative instruments that are part of a hedging relationship to specific forecasted transactions or recognized obligations on the consolidated balance sheets. The Company also assesses and documents, both at the hedging instrument’s inception and on a quarterly basis thereafter, whether the derivative instruments that are used in hedging transactions are highly effective in offsetting changes in cash flows associated with the respective hedged items. When the Company determines that a derivative instrument ceases to be highly effective as a hedge, or that it is probable the underlying forecasted transaction will not occur, the Company discontinues hedge accounting prospectively and reclassifies amounts recorded to accumulated other comprehensive income (loss) to earnings.
Deferred Financing Costs	Deferred financing costs represent commitment fees, loan fees, legal fees and other third-party costs associated with obtaining financing and are presented on the balance sheet as a direct deduction from the carrying value of the associated debt liability. These costs are amortized over the terms of the respective financing agreements using the effective interest method. Unamortized deferred financing costs are generally expensed when the associated debt is refinanced or repaid before maturity unless specific rules are met that would allow for the carryover of such costs to the refinanced debt. Deferred financing costs incurred before an associated debt liability is recognized are included in prepaid and other assets on the balance sheet. Costs incurred in seeking financing transactions that do not close are expensed in the period in which it is determined that the financing will not close.
Fair Value Measurements	Under GAAP, the Company is required to measure certain financial instruments at fair value on a recurring basis. In addition, the Company is required to measure other non-financial and financial assets at fair value on a non-recurring basis (e.g., carrying value of long-lived assets). Fair value is defined as the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The GAAP fair value framework uses a three-tiered approach. Fair value measurements are classified and disclosed in one of the following three categories: • Level 1: unadjusted quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities; • Level 2: quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and • Level 3: prices or valuation techniques where little or no market data is available that requires inputs that are both significant to the fair value measurement and unobservable. When available, the Company utilizes quoted market prices from independent third-party sources to determine fair value and classifies such items in Level 1 or Level 2. In instances where the market for a financial instrument is not active, regardless of the availability of a nonbinding quoted market price, observable inputs might not be relevant and could require the Company to make a significant adjustment to derive a fair value measurement. Additionally, in an inactive market, a market price quoted from an independent third party may rely more on models with inputs based on information available only to that independent third party. When the Company determines the market for a financial instrument owned by the Company to be illiquid or when market transactions for similar instruments do not appear orderly, the Company uses several valuation sources (including internal valuations, discounted cash flow analysis and quoted market prices) and establishes a fair value by assigning weights to the various valuation sources. Additionally, when determining the fair value of liabilities in circumstances in which a quoted price in an active market for an identical liability is not available, the Company measures fair value using (i) a valuation technique that uses the quoted price of the identical liability when traded as an asset or quoted prices for similar liabilities or similar liabilities when traded as assets or (ii) another valuation technique that is consistent with the principles of fair value measurement, such as the income approach or the market approach. Changes in assumptions or estimation methodologies can have a material effect on these estimated fair values. In this regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, may not be realized in an immediate settlement of the instrument. The Company considers the following factors to be indicators of an inactive market: (i) there are few recent transactions, (ii) price quotations are not based on current information, (iii) price quotations vary substantially either over time or among market makers (for example, some brokered markets), (iv) indexes that previously were highly correlated with the fair values of the asset or liability are demonstrably uncorrelated with recent indications of fair value for that asset or liability, (v) there is a significant increase in implied liquidity risk premiums, yields, or performance indicators (such as delinquency rates or loss severities) for observed transactions or quoted prices when compared with the Company’s estimate of expected cash flows, considering all available market data about credit and other nonperformance risk for the asset or liability, (vi) there is a wide bid-ask spread or significant increase in the bid-ask spread, (vii) there is a significant decline or absence of a market for new issuances (that is, a primary market) for the asset or liability or similar assets or liabilities, and (viii) little information is released publicly (for example, a principal-to-principal market). The Company considers the following factors to be indicators of non-orderly transactions: (i) there was not adequate exposure to the market for a period before the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities under current market conditions, (ii) there was a usual and customary marketing period, but the seller marketed the asset or liability to a single market participant, (iii) the seller is in or near bankruptcy or receivership (that is, distressed), or the seller was required to sell to meet regulatory or legal requirements (that is, forced), and (iv) the transaction price is an outlier when compared with other recent transactions for the same or similar assets or liabilities.
Redeemable Common Stock	The Company’s share redemption program provides that stockholders may sell their shares to the Company in limited circumstances. Commencing with redemptions in 2019, the Company’s share redemption program is only available for redemptions sought upon a stockholder’s death, “qualifying disability” or “determination of incompetence” (each as defined in the share redemption program, and collectively “special redemptions”). Previously, ordinary redemptions were available under the terms of the Company’s share redemption program. Pursuant to the Company’s share redemption program, as amended to date, there are several limitations on the Company’s ability to redeem shares: • During each calendar year, special redemptions are limited to an annual dollar amount determined by the board of directors, which may be reviewed during the year and increased or decreased upon ten business days’ notice to the Company’s stockholders. The dollar amount limitation for special redemptions for the calendar year 2019 is $1.0 million in the aggregate, as may be reviewed and adjusted from time to time by the board of directors. • During any calendar year, the Company may redeem no more than 5% of the weighted‑average number of shares outstanding during the prior calendar year. • The Company has no obligation to redeem shares if the redemption would violate the restrictions on distributions under Maryland law, which prohibits distributions that would cause a corporation to fail to meet statutory tests of solvency. During 2018, the Company’s ability to redeem shares in connection with a special redemption or ordinary redemption was limited to the number of shares that the Company could purchase with the amount of net proceeds from the sale of shares under its distribution reinvestment plan during the prior calendar year. In addition, except for special redemptions, the Company could not redeem shares unless the stockholder had held his or her shares for one year. Special redemptions are redeemed at a price equal to the most recent estimated NAV per share as of the applicable redemption date. Ordinary redemptions were redeemed at 95.0% of the Company’s most recent estimated NAV per share as of the applicable redemption date. On December 8, 2017, the Company’s board of directors approved an estimated value per share of the Company’s common stock of $8.79 (unaudited) based on the estimated value of the Company’s assets less the estimated value of the Company’s liabilities, divided by the number of shares outstanding, all as of September 30, 2017, with the exception of a reduction to the Company’s net asset value for acquisition and financing costs related to a real estate acquisition subsequent to September 30, 2017. The change in the redemption price was effective for the December 2017 through November 2018 redemption dates. On December 7, 2018, the Company’s board of directors approved an estimated value per share of the Company’s common stock of $9.20 (unaudited) based on the estimated value of the Company’s assets less the estimated value of the Company’s liabilities, divided by the number of shares outstanding, all as of September 30, 2018. The change in the redemption price became effective for the December 2018 redemption date, which was December 31, 2018, and will be effective until the estimated value per share is updated. The Company records amounts that are redeemable under the share redemption program as redeemable common stock liability in its consolidated balance sheets because the shares will be mandatorily redeemable at the option of the holder and therefore their redemption is outside the control of the Company. The maximum amount redeemable under the Company’s share redemption program is limited to the number of shares the Company could redeem with the amount of the net proceeds from the sale of shares under the distribution reinvestment plan during the prior calendar year. However, because the amounts that can be redeemed are determinable and only contingent on an event that is likely to occur (e.g., the passage of time) the Company presents the net proceeds from the current year and prior year distribution reinvestment plan, net of current year redemptions, as redeemable common stock in its consolidated balance sheets. The Company will classify as liabilities financial instruments that represent a mandatory obligation of the Company to redeem shares. The Company’s redeemable common shares are contingently redeemable at the option of the holder. When the Company determines it has a mandatory obligation to repurchase shares under the share redemption program, it will reclassify such obligations from temporary equity to a liability based upon their respective settlement values.
Related Party Transactions	in the Advisory Agreement. See Note 8, “Related Party Transactions.” In addition, the Advisor will pay all offering expenses related to the Second Private Offering without reimbursement by the Company. In addition, in connection with certain property acquisitions, the Company, through indirect wholly owned subsidiaries, has entered into separate property management agreements (each, a “Property Management Agreement”) with KBS Management Group, LLC (the “Co-Manager”), an affiliate of the Advisor. The Company records all related party fees as incurred, subject to any limitations described in the respective agreements. The Company had not incurred any disposition fees, subordinated participation in net cash flows or subordinated incentive fees payable to the Advisor through December 31, 2018 .
Related Party Transactions, Selling Commissions and Dealer Manager Fees	In the Initial Private Offering, the Company paid the Dealer Manager up to 6.5% of the price per share of Class A common stock sold in the primary portion of the Initial Private Offering as a selling commission. The Dealer Manager reallowed 100% of selling commissions earned to participating broker-dealers. No sales commissions were paid on shares sold through the distribution reinvestment plan. In the Initial Private Offering, the Company paid the Dealer Manager up to 2.0% of the price per share of Class A common stock sold in the primary portion of the Initial Private Offering as a dealer manager fee. No dealer manager fee was payable on shares sold under the distribution reinvestment plan. From its dealer manager fee, the Dealer Manager could reallow to any participating broker-dealer up to 1.0% of the price per share of Class A common stock sold in the Initial Private Offering attributable to that participating broker-dealer as a marketing fee and in special cases the dealer manager could increase the reallowance. In the Public Offering, the Company paid selling commissions to the Dealer Manager in amounts up to 6.5% of the price per share of Class A common stock sold in the primary portion of the Public Offering and up to 3.0% of the price per share of Class T common stock sold in the primary portion of the Public Offering. Additionally, in the Public Offering, the Company paid dealer manager fees to the Dealer Manager in an amount up to 2.0% of the price per share of Class A and Class T common stock sold in the primary portion of the Public Offering. The Dealer Manager reallowed all selling commissions to participating broker dealers and could generally reallow (from its dealer manager fee) to any participating broker dealer up to 1.0% of the gross proceeds from the primary portion of the Public Offering attributable to that participating broker dealer as a marketing fee and in select cases up to 1.5% of the gross proceeds from the primary portion of the Public Offering was reallowed. No selling commissions or dealer manager fees were payable on shares of common stock sold under the distribution reinvestment plan. The Advisor has agreed to pay selling commissions to NCPS of 0.5% of the price per share of Class A common stock sold in the Second Private Offering on behalf of the Company without reimbursement by the Company.
Related Party Transactions, Acquisition Fees	Through August 8, 2017, the Company paid the Advisor 2.0% of the cost of investments acquired by the Company, including acquisition expenses and any debt attributable to such investments, plus significant capital expenditures budgeted as of the date of acquisition related to the development, construction or improvement of a real estate property. Acquisition fees calculated based on capital expenditures budgeted as of the date of acquisition were paid at the time funds were disbursed pursuant to a final approved budget upon receipt of an invoice by the Company. On August 9, 2017, the Company entered into an amended and restated advisory agreement with the Advisor, which, among other changes, eliminated the payment of acquisition fees to the Advisor.
Related Party Transactions, Acquisition Expenses	The Company reimburses the Advisor for customary acquisition expenses (including expenses relating to potential investments that the Company does not close), such as legal fees and expenses (including fees of independent contractor in-house counsel that are not employees of the Advisor), costs of due diligence (including, as necessary, updated appraisals, surveys and environmental site assessments), travel and communications expenses, accounting fees and expenses and other closing costs and miscellaneous expenses relating to the acquisition of real estate properties.
Related Party Transactions, Stockholder Servicing Fee	During the Public Offering, the Company paid the Dealer Manager an annual stockholder servicing fee of 1.0% of the purchase price per share (ignoring any discounts available to certain categories of purchasers) of Class T common stock sold in the Primary Offering solely to the extent there was a broker dealer of record with respect to such Class T share that had entered into a currently effective selected dealer agreement or servicing agreement that provided for the payment to such broker dealer of the stockholder servicing fee with respect to such Class T share, and such broker dealer of record was in compliance with the applicable terms of such selected dealer agreement or servicing agreement related to such payment. To the extent payable, the stockholder servicing fee accrued daily and was paid monthly in arrears, and the Dealer Manager reallowed 100% of the stockholder servicing fee to such broker dealer of record for services provided to Class T stockholders after the initial sale of the Class T share. No stockholder servicing fee was paid with respect to Class T shares purchased through the distribution reinvestment plan or issued pursuant to a stock dividend. The Company recorded the stockholder servicing fee as a reduction to additional paid-in capital and the related liability in an amount equal to the maximum stockholder servicing fee payable in relation to the Class T share on the date the share was issued. For each share of Class T common stock in the Primary Offering, the maximum stockholder servicing fee equaled 4% of the purchase price per share (ignoring any discounts available to certain categories of purchasers). The Public Offering was terminated effective June 30, 2017. Pursuant to the terms of the Class T shares as set forth in the Articles Supplementary and Multiple Class Plan of the Company, the Company ceased accruing for stockholder servicing fees after June 30, 2017.
Related Party Transactions, Asset Management Fee	Through August 8, 2017, the Company paid the Advisor a monthly fee equal to one-twelfth of 1.6% of the cost of its investments, less any debt secured by or attributable to the investments. The cost of the real property investments was calculated as the amount paid or allocated to acquire the real property, plus the budgeted capital improvement costs for the development, construction or improvements to the property once such funds were disbursed pursuant to a final approved budget and fees and expenses related to the acquisition, but excluding acquisition fees paid or payable to the Advisor. Beginning August 9, 2017, pursuant to an amended and restated advisory agreement with the Advisor, a monthly fee is payable to the Advisor from the Company equal to one‑twelfth of 1.0% of the cost of the real property investments, including any debt financing on the property. The cost of the real property investments is calculated as the amount paid or allocated to acquire the real property, plus budgeted capital improvement costs for the development, construction or improvements to the property once such funds are disbursed pursuant to a final approved budget and typical third‑party expenses related to the acquisition.
Related Party Transactions, Property Management Fee	The Company pays the Co-Manager a monthly fee equal to a percentage of the rent (determined on a property by property basis), payable and actually collected for the month, from certain property acquisitions for which the Company has entered a Property Management Agreement with the Co-Manager. See Note 8, “Related-Party Transactions — Real Estate Property Co-Management Agreements.”
Related Party Transactions, Disposition Fee	For substantial assistance in connection with the sale of the Company’s assets, which includes the sale of a single asset or the sale of all or a portion of the Company’s assets through a portfolio sale, merger or business combination transaction, the Company will pay the Advisor or its affiliates a percentage of the contract sales price of the assets sold. The disposition fee will equal 1.5% of the contract sales price. The disposition fee is determined on a per transaction basis and is not cumulative.
Related Party Transactions, Reimbursement of Operating Expenses	Through September 28, 2017, the Company reimbursed the expenses incurred by the Advisor or its affiliates in connection with their provision of services to the Company, including the Company’s allocable share of the Advisor’s overhead, such as rent, employee costs, utilities and cybersecurity costs. The Company also reimbursed the Advisor for its allocable portion of the salaries, benefits and overhead of internal audit department personnel providing services to the Company. Effective September 29, 2017, the Company only reimburses the Advisor for the following expenses it incurs in connection with providing services to the Company under the Advisory Agreement: the Company’s allocable portion of the costs of internal audit department personnel and promotional costs and expenses related to the leasing of properties. The Company reimbursed the Dealer Manager for certain fees and expenses it incurred for administering the Company’s participation in the DTCC Alternative Investment Product Platform, or the AIP Platform, with respect to certain accounts of the Company’s investors serviced through the AIP Platform.
Income Taxes	The Company has elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended. To continue to qualify as a REIT, the Company must meet certain organizational and operational requirements, including a requirement to distribute at least 90% of the Company’s annual REIT taxable income to stockholders (which is computed without regard to the dividends-paid deduction or net capital gain and which does not necessarily equal net income as calculated in accordance with GAAP). As a REIT, the Company generally will not be subject to federal income tax on income that it distributes as dividends to its stockholders. If the Company fails to qualify as a REIT in any taxable year, it will be subject to federal income tax on its taxable income at regular corporate income tax rates and generally will not be permitted to qualify for treatment as a REIT for federal income tax purposes for the four taxable years following the year during which qualification is lost, unless the Internal Revenue Service grants the Company relief under certain statutory provisions. Such an event could materially and adversely affect the Company’s net income and net cash available for distribution to stockholders. However, the Company believes that it is organized and operates in such a manner as to qualify for treatment as a REIT. The Company has concluded that there are no significant uncertain tax positions requiring recognition in its financial statements. Neither the Company nor its subsidiaries have been assessed interest or penalties by any major tax jurisdictions. The Company’s evaluations were performed for all open tax years through December 31, 2018 . As of December 31, 2018 , returns for the calendar years 2015 through 2017 remain subject to examination by major tax jurisdictions.
Segments	The Company had invested in four office buildings as of December 31, 2018 . Substantially all of the Company’s revenue and net loss is from real estate, and therefore, the Company currently operates in one reportable segment.
Per Share Data	Basic net income (loss) per share of common stock is calculated by dividing net income (loss) by the weighted-average number of shares of common stock issued and outstanding during such period. Diluted net income (loss) per share of common stock equals basic net income (loss) per share of common stock as there were no potentially dilutive securities outstanding for the years ended December 31, 2018 , 2017 and 2016 . For the purpose of determining the weighted average number of shares outstanding, stock dividends issued during the period presented are adjusted retroactively and treated as if they were issued and outstanding for all periods presented. During the years ended December 31, 2018 , 2017 and 2016 , aggregate cash distributions declared per share of Class A common stock were $0.51295025 , $0.49373176 and $0.49999890 , assuming the share was issued and outstanding each date that was a record date for distributions during the period. During the years ended December 31, 2018 , 2017 and 2016 , aggregate cash distributions declared per share of Class T common stock were $0.51295025 , $0.44464258 and $0.17462989 , assuming the share was issued and outstanding each date that was a record date for distributions during the period. Distributions for the period from January 1, 2016 through August 31, 2017 were calculated at a rate of (i) $0.00136986 per share per day, less (ii) the applicable daily class-specific stockholder servicing fees accrued for and allocable to any class of common stock, divided by the number of shares of common stock of such class outstanding as of the close of business on each respective record date. Distributions for the period from September 1, 2017 through December 31, 2017 were calculated at a rate of $0.00131849 per share per day. Distributions for the period from January 1, 2018 through April 30, 2018 and from May 1, 2018 through December 31, 2018 were calculated at a rate of $0.00132452 per share per day and $0.00144493 per share per day, respectively. Each day during the years ended December 31, 2018 and 2017 and the periods from January 1, 2016 through February 28, 2016 and March 1, 2016 through December 31, 2016 was a record date for distributions. In accordance with FASB ASC Topic 260-10-45, Earnings Per Share , the Company uses the two-class method to calculate earnings per share. Basic earnings per share is calculated based on dividends declared (“distributed earnings”) and the rights of common shares and participating securities in any undistributed earnings, which represents net income remaining after deduction of dividends declared during the period. The undistributed earnings are allocated to all outstanding common shares based on the relative percentage of each class of shares to the total number of outstanding shares. The Company does not have any participating securities outstanding other than Class A Common Stock and Class T Common Stock during the periods presented. The Company’s calculated earnings per share for the years ended December 31, 2018 , 2017 and 2016 were as follows (in thousands, except share and per share amounts): Years Ended December 31, 2018 2017 2016 Net loss $ (3,601 ) $ (2,199 ) $ (4,089 ) Less: Class A Common Stock cash distributions declared 4,724 4,472 3,649 Less: Class T Common Stock cash distributions declared 148 111 5 Undistributed net loss $ (8,473 ) $ (6,782 ) $ (7,743 ) Class A Common Stock: Undistributed net loss $ (8,216 ) $ (6,603 ) $ (7,729 ) Class A Common Stock cash distributions declared 4,724 4,472 3,649 Net loss $ (3,492 ) $ (2,131 ) $ (4,080 ) Net loss per common share, basic and diluted $ (0.38 ) $ (0.23 ) $ (0.55 ) Weighted-average number of common shares outstanding, basic and diluted 9,205,952 9,080,826 7,393,983 Class T Common Stock: Undistributed net loss $ (257 ) $ (179 ) $ (14 ) Class T Common Stock cash distributions declared 148 111 5 Net loss $ (109 ) $ (68 ) $ (9 ) Net loss per common share, basic and diluted $ (0.38 ) $ (0.28 ) $ (0.68 ) Weighted-average number of common shares outstanding, basic and diluted 288,586 246,737 13,718
Square Footage, Occupancy and Other Measures	Square footage, occupancy, number of tenants and other measures, including annualized base rent and annualized base rent per square foot, or amounts derived from such measures, used to describe real estate investments included in these Notes to Consolidated Financial Statements are presented on an unaudited basis.
Recently Issued Accounting Standards Updates	In July 2018, the FASB issued ASU No. 2018-11, Leases (Topic 842), Targeted Improvements (“ASU No. 2018-11”), which provides lessors with a practical expedient, by class of underlying asset, to not separate nonlease components from the associated lease component and, instead to account for those components as a single component if the nonlease components otherwise would be accounted for under the new revenue recognition standard (Topic 606) and if certain conditions are met. Upon its adoption of the lease accounting standard under Topic 842, the Company adopted this practical expedient, specifically related to its tenant reimbursements for common area maintenance which would otherwise be accounted for under the revenue recognition standard. The Company believes the two conditions have been met for tenant reimbursements for common area maintenance as 1) the timing and pattern of transfer of the nonlease components and associated lease components are the same and 2) the lease component would be classified as an operating lease. Accordingly, tenant reimbursements for common area maintenance will be accounted for as rental income on the Company’s statement of operations beginning January 1, 2019. In addition, ASU No. 2018-11, provides an additional optional transition method to allow entities to apply the new lease accounting standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings. An entity’s reporting for the comparative periods presented in the financial statements in which it adopts the new lease accounting standard will continue to be reported under the current lease accounting standards of Topic 840. The Company adopted this transition method upon its adoption of the lease accounting standard of Topic 842, which did not result in a cumulative effect adjustment to the opening balance of retained earnings on January 1, 2019. In December 2018, the FASB issued ASU No. 2018-20, Leases (Topic 842), Narrow-Scope Improvements for Lessors (“ASU No. 2018-20”), which permits lessors, as an accounting policy election, to not evaluate whether certain sales taxes and other similar taxes are lessor costs or lessee costs and instead to account for these costs as if they were lessee costs. In addition, ASU No. 2018-20 requires lessors to 1) exclude lessor costs paid directly by lessees to third parties on the lessor’s behalf from variable payments and 2) include lessor costs that are reimbursed by the lessee in the measurement of variable lease revenue and the associated expense. The amendments also clarify that lessors are required to allocate the variable payments to the lease and non-lease components and follow the recognition guidance in Topic 842 for the lease component and other applicable guidance, such as ASC 606, for the non-lease component. The Company made the accounting policy election related to sales taxes upon adoption of the lease accounting standard of Topic 842 on January 1, 2019. The Company created an inventory of its leases where the Company may be a lessee to assess the potential impact to the Company’s financial statements. The adoption of the new lease accounting standard did not have a material impact to the Company’s financial statements on January 1, 2019. Beginning January 1, 2019, the Company, as a lessor, will record legal costs incurred to negotiate an operating lease as an expense, classified as operating, maintenance, and management on the Company’s consolidated statement of operations, as these costs are no longer capitalizable under the definition of initial direct costs under Topic 842. In addition, the Company will account for new leases, including modifications of existing leases, entered into on and after January 1, 2019 under the new lease accounting standard under Topic 842 and follow the related presentation and disclosure requirements for reporting periods subsequent to January 1, 2019. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses of Financial Instruments (“ASU No. 2016-13”). ASU No. 2016-13 affects entities holding financial assets and net investments in leases that are not accounted for at fair value through net income. The amendments in ASU No. 2016-13 require a financial asset (or a group of financial assets) measured at amortized cost basis to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset(s) to present the net carrying value at the amount expected to be collected on the financial asset. ASU No. 2016-13 also amends the impairment model for available-for-sale securities. An entity will recognize an allowance for credit losses on available-for-sale debt securities as a contra-account to the amortized cost basis rather than as a direct reduction of the amortized cost basis of the investment, as is currently required. ASU No. 2016-13 also requires new disclosures. For financial assets measured at amortized cost, an entity will be required to disclose information about how it developed its allowance for credit losses, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. For financing receivables and net investments in leases measured at amortized cost, an entity will be required to further disaggregate the information it currently discloses about the credit quality of these assets by year of the asset’s origination for as many as five annual periods. For available-for-sale securities, an entity will be required to provide a roll-forward of the allowance for credit losses and an aging analysis for securities that are past due. ASU No. 2016-13 is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company is still evaluating the impact of adopting ASU No. 2016-13 on its financial statements. In November 2018, the FASB issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments-Credit Losses, which clarified that receivables from operating leases are not within the scope of Topic 326 and instead, impairment of receivables arising from operating leases should be accounted for in accordance with Topic 842. In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework -Changes to the Disclosure Requirements for Fair Value Measurement (“ASU No. 2018-13”). The primary focus of ASU 2018-13 is to improve the effectiveness of the disclosure requirements for fair value measurements. ASU No. 2018-13 removes the requirement to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for the timing of transfers between levels and the valuation processes for Level 3 fair value measurements. It also adds a requirement to disclose changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and to dislcose the range and weighted average of significant unobservable inputs used to develop recurring and nonrecurring Level 3 fair value measurements. For certain unobservable inputs, entities may disclose other quantitative information in lieu of the weighted average if the other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop the Level 3 fair value measurements. In addition, public entities are required to provide information about the measurement uncertainty of recurring Level 3 fair value measurements from the use of significant unobservable inputs if those inputs reasonably could have been different at the reporting date. ASU No. 2018-13 is effective for annual periods beginning after December 15, 2019, including interim periods within those fiscal years. Entities are permitted to early adopt either the entire standard or only the provisions that eliminate or modify the requirements. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. The Company is still evaluating the impact of adopting ASU No. 2018-13 on its financial statements, but does not expect the adoption of ASU No. 2018-13 to have a material impact on its financial statements.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Estimated Useful Life	The Company anticipates the estimated useful lives of its assets by class to be generally as follows: Buildings 25 - 40 years Building improvements 10 - 25 years Tenant improvements Shorter of lease term or expected useful life Tenant origination and absorption costs Remaining term of related leases, including below-market renewal periods
Schedule of Dividends Declared	The Company has declared and issued stock dividends on shares of the Company’s common stock during the years ended December 31, 2017 and 2016 as follows: Amount Declared per Share Outstanding (1) Total Shares Issued Year Ended December 31, 2016 0.01000004 shares 69,869 Year Ended December 31, 2017 0.00666664 shares 69,286 _____________________ (1) Stock dividends were declared on a monthly basis and the amount declared per share outstanding assumes the share was issued and outstanding each date that was a record date for stock dividends during the periods presented. Stock dividends are issued in the same class of shares as the shares for which such stockholder received the stock dividend. The Company ceased issuing stock dividends to all stockholders on September 5, 2017. The Company's board of directors does not expect to authorize any additional stock dividends.
Schedule of Earnings Per Share, Including Two Class Method	The Company’s calculated earnings per share for the years ended December 31, 2018 , 2017 and 2016 were as follows (in thousands, except share and per share amounts): Years Ended December 31, 2018 2017 2016 Net loss $ (3,601 ) $ (2,199 ) $ (4,089 ) Less: Class A Common Stock cash distributions declared 4,724 4,472 3,649 Less: Class T Common Stock cash distributions declared 148 111 5 Undistributed net loss $ (8,473 ) $ (6,782 ) $ (7,743 ) Class A Common Stock: Undistributed net loss $ (8,216 ) $ (6,603 ) $ (7,729 ) Class A Common Stock cash distributions declared 4,724 4,472 3,649 Net loss $ (3,492 ) $ (2,131 ) $ (4,080 ) Net loss per common share, basic and diluted $ (0.38 ) $ (0.23 ) $ (0.55 ) Weighted-average number of common shares outstanding, basic and diluted 9,205,952 9,080,826 7,393,983 Class T Common Stock: Undistributed net loss $ (257 ) $ (179 ) $ (14 ) Class T Common Stock cash distributions declared 148 111 5 Net loss $ (109 ) $ (68 ) $ (9 ) Net loss per common share, basic and diluted $ (0.38 ) $ (0.28 ) $ (0.68 ) Weighted-average number of common shares outstanding, basic and diluted 288,586 246,737 13,718

REAL ESTATE (Tables)

REAL ESTATE (Tables)	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
Schedule of Real Estate Investments	The following table provides summary information regarding the properties owned by the Company as of December 31, 2018 (in thousands): Property Date Acquired City State Property Type Total Real Estate at Cost Accumulated Depreciation and Amortization Total Real Estate, Net Von Karman Tech Center 08/12/2015 Irvine CA Office $ 20,380 $ (1,688 ) $ 18,692 Commonwealth Building 06/30/2016 Portland OR Office 77,262 (7,913 ) 69,349 The Offices at Greenhouse 11/14/2016 Houston TX Office 47,241 (5,163 ) 42,078 Institute Property 11/09/2017 Chicago IL Office 45,868 (2,352 ) 43,516 $ 190,751 $ (17,116 ) $ 173,635
Schedules of Concentration of Risk, by Risk Factor	As of December 31, 2018 , the following properties represented more than 10% of the Company’s total assets: Property Location Rentable Square Feet Total Real Estate, Net (in thousands) Percentage of Total Assets Annualized Base Rent (in thousands) (1) Average Annualized Base Rent per sq. ft. Occupancy Von Karman Tech Center Irvine, CA 101,161 $ 18,692 10.1 % $ 2,007 $ 22.63 87.6 % Commonwealth Building Portland, OR 224,122 69,349 37.4 % 5,849 27.10 96.3 % The Offices at Greenhouse Houston, TX 203,284 42,078 22.7 % 4,201 20.66 100.0 % Institute Property Chicago, IL 155,385 43,516 23.4 % 3,306 26.33 80.8 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of December 31, 2018 , adjusted to straight-line any contractual tenant concessions (including free rent), rent increases and rent decreases from the lease’s inception through the balance of the lease term. The Company’s highest tenant industry concentration (greater than 10% of annualized base rent) was as follows: Industry Number of Tenants Annualized Base Rent (1) (in thousands) Percentage of Professional, scientific and technical 12 $ 5,866 38.2 % Information technology 9 2,093 13.6 % _____________________ (1) Annualized base rent represents annualized contractual base rental income as of December 31, 2018 , adjusted to straight-line any contractual tenant concessions (including free rent), rent increases and rent decreases from the lease’s inception through the balance of the lease term.
Schedule of Future Minimum Rental Income for Company's Properties	As of December 31, 2018 , the future minimum rental income from the Company’s properties under its non-cancelable operating leases was as follows (in thousands): 2019 $ 14,692 2020 14,853 2021 13,438 2022 11,449 2023 7,957 Thereafter 9,426 $ 71,815

TENANT ORIGINATION AND ABSORP_2

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2018
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Abstract]
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities	As of December 31, 2018 and 2017 , the Company’s tenant origination and absorption costs, above-market lease assets and below-market lease liabilities (excluding fully amortized assets and liabilities and accumulated amortization) were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities 2018 2017 2018 2017 2018 2017 Cost $ 15,981 $ 17,047 $ 213 $ 213 $ (7,072 ) $ (7,838 ) Accumulated Amortization (5,848 ) (3,480 ) (63 ) (33 ) 3,204 1,928 Net Amount $ 10,133 $ 13,567 $ 150 $ 180 $ (3,868 ) $ (5,910 )
Amortization of Tenant Origination and Absorption Costs, Above-Market Leases and Below-Market Lease Liabilities	Increases (decreases) in net income as a result of amortization of the Company’s tenant origination and absorption costs, above-market lease assets and below-market lease liabilities for the years ended December 31, 2018 , 2017 and 2016 were as follows (in thousands): Tenant Origination and Absorption Costs Above-Market Lease Assets Below-Market Lease Liabilities For the Years Ended December 31, For the Years Ended December 31, For the Years Ended December 31, 2018 2017 2016 2018 2017 2016 2018 2017 2016 Amortization $ (3,434 ) $ (2,826 ) $ (1,135 ) $ (30 ) $ (30 ) $ (4 ) $ 2,042 $ 1,514 $ 712
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The remaining unamortized balance for these outstanding intangible assets and liabilities as of December 31, 2018 is estimated to be amortized for the years ending December 31 as follows (in thousands): Tenant Origination and Above-Market Below-Market 2019 $ (2,589 ) $ (30 ) $ 1,278 2020 (2,224 ) (28 ) 1,032 2021 (1,768 ) (21 ) 596 2022 (1,498 ) (21 ) 450 2023 (962 ) (21 ) 198 Thereafter (1,092 ) (29 ) 314 $ (10,133 ) $ (150 ) $ 3,868 Weighted-Average Remaining Amortization Period 4.9 years 6.0 years 4.2 years

NOTES PAYABLE (Tables)

NOTES PAYABLE (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	As of December 31, 2018 and 2017 , the Company’s notes payable consisted of the following (dollars in thousands): Book Value as of December 31, 2018 Book Value as of December 31, 2017 Contractual Interest Rate as of December 31, 2018 (1) Effective Interest Rate as of December 31, 2018 (1) Payment Type Maturity Date (2) Commonwealth Building Mortgage Loan (3) $ 45,000 $ 41,000 One-month LIBOR + 1.80% 4.15% Interest Only 02/01/2023 Term Loan (4) 72,800 72,800 One-month LIBOR + 2.00% 4.16% Interest Only 11/09/2020 Notes payable principal outstanding $ 117,800 $ 113,800 Deferred financing costs, net (967 ) (1,020 ) Notes payable, net $ 116,833 $ 112,780 _____________________ (1) Contractual interest rate represents the interest rate in effect under the loan as of December 31, 2018 . Effective interest rate is calculated as the actual interest rate in effect as of December 31, 2018 (consisting of the contractual interest rate and the effect of interest rate swaps, if applicable), using interest rate indices as of December 31, 2018 , where applicable. (2) Represents the maturity date as of December 31, 2018 ; subject to certain conditions, the maturity dates of certain loans may be extended beyond the dates shown. (3) On January 18, 2018, the Company, through an indirect wholly owned subsidiary, closed the refinancing of the initial Commonwealth Building mortgage loan with an unaffiliated lender (the “Refinancing”) for a maximum loan amount of up to $51.4 million . With the proceeds from the Refinancing, the Company repaid $41.0 million of principal in satisfaction of the initial Commonwealth Building mortgage loan. Under the Refinancing, monthly payments are interest-only with the remaining principal balance, all accrued and unpaid interest and all other sums due under the loan documents payable at maturity. If the LIBOR rate is equal to or greater than 2.90% for five consecutive business days, the Company has 30 days to enter into an interest rate cap agreement with a LIBOR strike rate of 3.90% or less. The Company has the right to prepay all or a portion of the loan under the Refinancing commencing on February 1, 2019, subject to certain fees and conditions contained in the loan documents. As of December 31, 2018 , there are two one -year extension options remaining on the Commonwealth Building Mortgage Loan. As of December 31, 2018 , $45.0 million of the Commonwealth Building mortgage loan was outstanding and $6.4 million remained available for future disbursements, subject to certain terms and conditions set forth in the loan documents. (4) As of December 31, 2018 , the outstanding balance under the Term Loan consisted of $48.5 million of term commitment and $24.3 million of revolving commitment, which bears interest at a rate per annum equal to 2.0% over one-month LIBOR. As of December 31, 2018 , there are two one -year extension options remaining on the Term Loan. The Term Loan was secured by The Offices at Greenhouse, Von Karman Tech Center and Institute Property.
Schedule of Maturities of Long-term Debt	The following is a schedule of maturities, including principal amortization payments, for all notes payable outstanding as of December 31, 2018 (in thousands): 2019 $ — 2020 72,800 2021 — 2022 — 2023 45,000 Thereafter — $ 117,800

DERIVATIVE INSTRUMENTS (Tables)

DERIVATIVE INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional and Fair Value of Interest Rate Swaps	The following table summarizes the notional amount and other information related to the Company’s interest rate swaps as of December 31, 2018 and 2017 . The notional amount is an indication of the extent of the Company’s involvement in each instrument at that time, but does not represent exposure to credit, interest rate or market risks (dollars in thousands): December 31, 2018 December 31, 2017 Weighted-Average Fix Pay Rate Weighted-Average Remaining Term in Years Derivative Instruments Number of Instruments Notional Amount Number of Instruments Notional Amount Reference Rate as of December 31, 2018 Derivative instruments not designated as hedging instruments Interest Rate Swaps (1) 2 $ 78,533 1 $ 48,533 One-month LIBOR/ 2.36% 3.22 _____________________ (1) Includes a forward interest rate swap in the amount of $30.0 million , which will become effective on April 1, 2019 and maturing on November 1, 2022.
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table sets forth the fair value of the Company’s derivative instruments as well as their classification on the consolidated balance sheets as of December 31, 2018 and 2017 (dollars in thousands): December 31, 2018 December 31, 2017 Derivative Instruments Balance Sheet Location Number of Fair Value Number of Fair Value Derivative instruments not designated as hedging instruments Interest Rate Swaps Prepaid expenses and other assets, at fair value 1 $ 501 1 $ 178 Interest Rate Swaps Other liabilities, at fair value 1 $ (409 ) — $ —
Schedule of Derivative Instruments in Statement of Operations	The following table summarizes the effects of derivative instruments on the Company’s consolidated statements of operations (in thousands): For the Years Ended December 31, 2018 2017 2016 Income statement related Derivatives not designated as hedging instruments Realized gain recognized on interest rate swaps $ (21 ) $ — $ — Unrealized loss (gain) on interest rate swaps 86 (178 ) — Increase (decrease) in interest expense as a result of derivatives $ 65 $ (178 ) $ —

FAIR VALUE DISCLOSURES (Tables)

FAIR VALUE DISCLOSURES (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of Face Value, Carrying Amounts and Fair Value	The following were the face values, carrying amounts and fair values of the Company’s notes payable as of December 31, 2018 and 2017 , which carrying amounts generally do not approximate the fair values (in thousands): December 31, 2018 December 31, 2017 Face Value Carrying Amount Fair Value Face Value Carrying Amount Fair Value Financial liabilities: Notes payable $ 117,800 $ 116,833 $ 118,911 $ 113,800 $ 112,780 $ 114,327
Schedule of Asset at Fair Value	As of December 31, 2018 , the Company measured the following derivative instruments at fair value (in thousands): Fair Value Measurements Using Total Quoted Prices in Active Markets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Recurring Basis: Asset derivative - interest rate swap $ 501 $ — $ 501 $ — Liability derivative - interest rate swap (409 ) — (409 ) —

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Schedule of Related Party Costs	Pursuant to the terms of these agreements, summarized below are the related-party costs incurred by the Company for the years ended December 31, 2018 , 2017 and 2016 , respectively, and any related amounts payable as of December 31, 2018 and 2017 (in thousands): Incurred Years Ended December 31, Payable as of December 31, 2018 2017 2016 2018 2017 Expensed Asset management fees (1) $ 1,855 $ 632 $ 399 $ 2,274 $ 418 Reimbursement of operating expenses (2) 197 185 151 16 18 Property management fees (3) 170 124 68 13 13 Real estate acquisition fees (4) — — 2,316 — — Other Arrangement Advisor advance for cash distributions (5) — — 1,139 1,338 1,338 Additional Paid-in Capital Selling commissions — 78 3,029 — — Dealer manager fees — 51 1,134 — — Stockholder servicing fees (6) — (26 ) 37 — — Reimbursable other offering costs (7) — 14 392 — — $ 2,222 $ 1,058 $ 8,665 $ 3,641 $ 1,787 _____________________ (1) Through August 8, 2017 , the asset management fee payable to the Advisor was a monthly fee equal to one-twelfth of 1.6% of the cost of the Company’s investments, less any debt secured by or attributable to the investments. Beginning on August 9, 2017, the asset management fee is a monthly fee payable to the Advisor in an amount equal to one-twelfth of 1.0% of the cost of the Company’s investments including the portion of the investment that is debt financed. As of December 31, 2018 , the Company had accrued and deferred payment of $2.3 million of asset management fees related to October 2017 through December 2018. (2) See “Reimbursable Operating Expenses” below. (3) See “Real Estate Property Co-Management Agreements” below. (4) On August 9, 2017, the Company entered into an amended and restated advisory agreement with the Advisor in which the Advisor will no longer be paid an acquisition fee in connection with acquisitions on or after August 9, 2017. (5) See “Advance from the Advisor” below. (6) The Public Offering was terminated effective June 30, 2017. Pursuant to the terms of the Class T shares as set forth in the Articles Supplementary and Multiple Class Plan of the Company, the Company ceased accruing for stockholder servicing fees after June 30, 2017 and reversed the amounts previously accrued. (7) See “Organization and Offering Costs” below.
Schedule of Annual Fee Percentage	Property Name Effective Date Annual Fee Percentage Von Karman Tech Center 07/31/2015 1.50% Commonwealth Building 07/01/2016 1.25% The Offices at Greenhouse 11/14/2016 0.25% Institute Property 11/09/2017 1.00%

SELECTED QUARTERLY FINANCIAL _2

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Schedule of Unaudited Quarterly Financial Information	Presented below is a summary of the unaudited quarterly financial information for the years ended December 31, 2018 and 2017 (in thousands, except per share amounts): 2018 First Quarter Second Quarter Third Quarter Fourth Quarter Revenues $ 5,581 $ 5,729 $ 5,561 $ 5,309 Class A Common Stock: Net loss (199 ) (703 ) (290 ) (2,300 ) Net loss per common share, basic and diluted (0.02 ) (0.08 ) (0.03 ) (0.25 ) Distributions declared per common share (1) 0.119 0.128 0.133 0.133 Class T Common Stock: Net loss (6 ) (22 ) (9 ) (72 ) Net loss per common share, basic and diluted (0.02 ) (0.08 ) (0.03 ) (0.25 ) Distributions declared per common share (1) 0.119 0.128 0.133 0.133 2017 First Quarter Second Quarter Third Quarter Fourth Quarter Revenues $ 4,033 $ 4,187 $ 4,028 $ 4,713 Class A Common Stock: Net loss (190 ) (406 ) (760 ) (775 ) Net loss per common share, basic and diluted (0.02 ) (0.04 ) (0.08 ) (0.08 ) Distributions declared per common share (1) 0.123 0.125 0.124 0.121 Class T Common Stock: Net loss (7 ) (18 ) (23 ) (20 ) Net loss per common share, basic and diluted (0.05 ) (0.07 ) (0.08 ) (0.08 ) Distributions declared per common share 0.099 0.100 0.124 0.121 __________________ (1) Distributions declared per common share assumes each share was issued and outstanding each day for the periods presented. Distributions for the periods from January 1, 2017 through August 31, 2017 were based on daily record dates and were calculated based on stockholders of record each day during this period at a rate of (i) $0.00136986 per share per day, less (ii) the applicable daily class-specific stockholder servicing fees accrued for and allocable to any class of common stock, divided by the number of shares of common stock of such class outstanding as of the close of business on each respective record date. Distributions for the period from September 1, 2017 through December 31, 2017 were based on daily record dates and were calculated based on stockholders of record each day during this period at a rate of $0.00131849 per share per day. Distributions for the period from January 1, 2018 through April 30, 2018 and from May 1, 2018 through December 31, 2018 were were based on daily record dates and were calculated based on stockholders of record each day during these periods at a rate of $0.00132452 per share per day and $0.00144493 per share per day, respectively.

ORGANIZATION (Details)

ORGANIZATION (Details)	Aug. 11, 2015USD ($)$ / sharesshares	Dec. 31, 2018USD ($)propertyshares	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares	Dec. 31, 2018USD ($)propertyshares	Dec. 31, 2018USD ($)propertyshares	Oct. 03, 2017shares	Jun. 11, 2015shares	Feb. 04, 2015USD ($)	Jan. 27, 2015$ / sharesshares
Organizational Structure [Line Items]
Core property, minimum percent of occupancy		80.00%			80.00%	80.00%
Issuance of common stock | $		$ 4,645,000	$ 5,421,000	$ 60,598,000
Stock redeemed | $		$ 2,314,000	$ 1,210,000
Class A common stock
Organizational Structure [Line Items]
Common stock, shares issued (in shares)		9,386,908	9,149,100		9,386,908	9,386,908
Class T common stock
Organizational Structure [Line Items]
Common stock, shares issued (in shares)		294,963	281,537		294,963	294,963
Private Placement | Class A common stock
Organizational Structure [Line Items]
Issuance of common stock | $						$ 76,800,000
Stock issued during period, value, dividend reinvestment plan | $						$ 700,000
Maximum | Second Private Placement | Class A common stock
Organizational Structure [Line Items]
Shares authorized for issuance (in shares)							1,000,000,000
Common Stock
Organizational Structure [Line Items]
Shares authorized for dividend reinvestment plan (in shares)								5,000,000
Primary offering, purchase price per share, discount	8.50%
Primary offering, purchase price per share (in dollars per share) | $ / shares	$ 8.90
Common Stock | Chief Executive Officer
Organizational Structure [Line Items]
Issuance of common stock (in shares)	21,181.2380
Common Stock | President
Organizational Structure [Line Items]
Issuance of common stock (in shares)	21,181.2390
Common Stock | Chief Executive Officer and President
Organizational Structure [Line Items]
Issuance of common stock | $	$ 172,500
Shares issued, price per share (in dollars per share) | $ / shares	$ 8.144
Common Stock | Class A common stock
Organizational Structure [Line Items]
Issuance of common stock (in shares)		514,880	380,538	6,559,574
Issuance of common stock | $		$ 6,000	$ 2,000	$ 65,000
Stock redeemed (in shares)		277,072	145,214			422,286
Stock redeemed | $		$ 3,000				$ 3,500,000
Common Stock | Class T common stock
Organizational Structure [Line Items]
Issuance of common stock (in shares)		13,426	185,845	93,918
Issuance of common stock | $		$ 0	$ 2,000	$ 1,000
Common Stock | Private Placement | Class A common stock
Organizational Structure [Line Items]
Issuance of common stock (in shares)						8,548,972
Stock issued during period, shares, dividend reinvestment plan (in shares)						74,744
Common Stock | Public Offering
Organizational Structure [Line Items]
Issuance of common stock | $					$ 3,900,000
Stock issued during period, value, dividend reinvestment plan | $					$ 5,400,000
Common Stock | Public Offering | Class A common stock
Organizational Structure [Line Items]
Issuance of common stock (in shares)					122,721
Stock issued during period, shares, dividend reinvestment plan (in shares)					566,328
Common Stock | Public Offering | Class T common stock
Organizational Structure [Line Items]
Issuance of common stock (in shares)					270,415
Stock issued during period, shares, dividend reinvestment plan (in shares)					22,774
Common Stock | Second Public Offering | Class A common stock
Organizational Structure [Line Items]
Issuance of common stock (in shares)					343,069
Issuance of common stock | $					$ 3,000,000
Common Stock | Maximum
Organizational Structure [Line Items]
Shares authorized for issuance (in shares)								105,000,000
Shares authorized for issuance | $									$ 1,500,000,000
Shares authorized for dividend reinvestment plan | $									$ 800,000,000
KBS Capital Advisors LLC
Organizational Structure [Line Items]
Common stock, shares issued (in shares)										20,000
Purchase price per share (in usd per share) | $ / shares										$ 10
Office Properties
Organizational Structure [Line Items]
Number of real estate properties | property		4			4	4
Operating Partnership
Organizational Structure [Line Items]
Managing member or general partner, ownership interest		0.10%
Members or limited partners, ownership interest		99.90%

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Subordinated Incentive Fee) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Tenant reimbursements	$ 3,993	$ 3,288	$ 630
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Tenant reimbursements	$ 100

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Useful Life) (Details)	12 Months Ended
	Dec. 31, 2018
Building | Minimum
Property, Plant and Equipment [Line Items]
Useful lives	25 years
Building | Maximum
Property, Plant and Equipment [Line Items]
Useful lives	40 years
Building Improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful lives	10 years
Building Improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful lives	25 years
Tenant Improvements
Property, Plant and Equipment [Line Items]
Useful lives	Shorter of lease term or expected useful life
Tenant Origination and Absorption Costs
Property, Plant and Equipment [Line Items]
Useful lives	Remaining term of related leases, including below-market renewal periods

SUMMARY OF SIGNIFICANT ACCOUN_6

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Cash and Cash Equivalents) (Details)	Dec. 31, 2018USD ($)
Accounting Policies [Abstract]
Restricted cash	$ 0

SUMMARY OF SIGNIFICANT ACCOUN_7

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Redeemable Common Stock) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 07, 2018	Dec. 08, 2017
Summary of Significant Accounting Policies [Line Items]
Period of Increase or Decrease of Funding Available for Redemption	10 days
Dollar limitation for special redemptions	$ 1
Maximum percentage of weighted-average shares outstanding available for redemption during any calendar year	5.00%
Ordinary redemption, percent of most recent net asset value per share	95.00%
Estimated value per share of company's common stock (in dollars per share)		$ 9.20	$ 8.79

SUMMARY OF SIGNIFICANT ACCOUN_8

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Selling Commissions and Dealer Manager Fees) (Details)	Dec. 31, 2018	Apr. 28, 2016
Second Private Offering | Common Stock | Class A common stock
Summary of Significant Accounting Policies [Line Items]
Selling commissions fees paid percent of sales price	0.50%
Dealer Manager | Class T common stock
Summary of Significant Accounting Policies [Line Items]
Percent of dealer manager reallows of sales commissions earned to participating broker-dealer		100.00%
Dealer Manager | Initial Private Offering
Summary of Significant Accounting Policies [Line Items]
Percent of dealer manager reallows of sales commissions earned to participating broker-dealer	100.00%
Dealer Manager | Initial Private Offering | Maximum | Common Stock | Class A common stock
Summary of Significant Accounting Policies [Line Items]
Selling commissions fees paid, percent of gross offering proceeds	6.50%
Dealer managers fees paid, percent of gross offering proceeds	2.00%
Sales commissions, broker dealer, percentage	1.00%
Dealer Manager | Public Offering | Maximum
Summary of Significant Accounting Policies [Line Items]
Dealer managers fees paid, percent of gross offering proceeds	2.00%
Sales commissions, broker dealer, percentage	1.00%
Marketing fee, percentage	1.50%
Dealer Manager | Public Offering | Maximum | Common Stock | Class A common stock
Summary of Significant Accounting Policies [Line Items]
Selling commissions fees paid, percent of gross offering proceeds	6.50%
Dealer Manager | Public Offering | Maximum | Common Stock | Class T common stock
Summary of Significant Accounting Policies [Line Items]
Selling commissions fees paid, percent of gross offering proceeds	3.00%

SUMMARY OF SIGNIFICANT ACCOUN_9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Acquisition Fees) (Details)	Aug. 08, 2017
KBS Capital Advisors LLC
Summary of Significant Accounting Policies [Line Items]
Acquisition advisory fee, percent	2.00%

SUMMARY OF SIGNIFICANT ACCOU_10

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Stockholder Servicing Fee) (Details) - Dealer Manager - Class T common stock	Jun. 30, 2018	Apr. 28, 2016
Summary of Significant Accounting Policies [Line Items]
Annual stockholder servicing fee as percent of purchase price per share paid to dealer manager		1.00%
Percent of dealer manager reallows of sales commissions earned to participating broker-dealer		100.00%
Stockholder servicing fee, percent of total purchase price	4.00%

SUMMARY OF SIGNIFICANT ACCOU_11

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Asset Management Fee) (Details) - KBS Capital Advisors LLC - Cost of Investments	Aug. 09, 2017	Aug. 08, 2017
Summary of Significant Accounting Policies [Line Items]
Asset management fee, percent fee	1.00%	1.60%
Monthly management fee, percent of cost of investment less debt secured by investments		0.13%
Monthly management fee, percent of cost and real estate property investment, including any debt financing on property	0.083%

SUMMARY OF SIGNIFICANT ACCOU_12

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Disposition Fee) (Details)	Dec. 31, 2018
KBS Capital Advisors LLC or Affiliates
Summary of Significant Accounting Policies [Line Items]
Disposition fee as percent of contract sales price	1.50%

SUMMARY OF SIGNIFICANT ACCOU_13

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Segments) (Details)	12 Months Ended
	Dec. 31, 2018segmentproperty
Accounting Policies [Abstract]
Number of reportable segments | segment	1
Office Properties
Real Estate Properties [Line Items]
Number of real estate properties | property	4

SUMMARY OF SIGNIFICANT ACCOU_14

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Stock Dividends) (Details)	12 Months Ended
	Dec. 31, 2017shares	Dec. 31, 2016shares
Accounting Policies [Abstract]
Common stock dividends declared, shares, ratio	0.00666664	0.01000004
Stock dividends issued (in shares)	69,286	69,869

SUMMARY OF SIGNIFICANT ACCOU_15

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Per Share Data) (Details) - $ / shares	3 Months Ended								4 Months Ended		8 Months Ended	12 Months Ended			20 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Apr. 30, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Aug. 31, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities (in shares)												0	0	0
Distribution rate per share per day, declared (in dollars per share)									$ 0.00132452	$ 0.00131849	$ 0.00144493				$ 0.00136986
Class A common stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributions declared per share (in dollars per share)	$ 0.133	$ 0.133	$ 0.128	$ 0.119	$ 0.121	$ 0.124	$ 0.125	$ 0.123				$ 0.51295025	$ 0.49373176	$ 0.49999890
Class T common stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distributions declared per share (in dollars per share)	$ 0.133	$ 0.133	$ 0.128	$ 0.119	$ 0.121	$ 0.124	$ 0.1	$ 0.099				$ 0.51295025	$ 0.44464258	$ 0.17462989

SUMMARY OF SIGNIFICANT ACCOU_16

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (EPS Two-class Method) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss									$ (3,601)	$ (2,199)	$ (4,089)
Undistributed net loss									(8,473)	(6,782)	(7,743)
Class A common stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (2,300)	$ (290)	$ (703)	$ (199)	$ (775)	$ (760)	$ (406)	$ (190)	(3,492)	(2,131)	(4,080)
Less: Common Stock cash distributions declared									4,724	4,472	3,649
Undistributed net loss									$ (8,216)	$ (6,603)	$ (7,729)
Net loss per common share, basic and diluted (in dollars per share)	$ (0.25)	$ (0.03)	$ (0.08)	$ (0.02)	$ (0.08)	$ (0.08)	$ (0.04)	$ (0.02)	$ (0.38)	$ (0.23)	$ (0.55)
Weighted-average number of common shares outstanding, basic and diluted (in shares)									9,205,952	9,080,826	7,393,983
Class T common stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (72)	$ (9)	$ (22)	$ (6)	$ (20)	$ (23)	$ (18)	$ (7)	$ (109)	$ (68)	$ (9)
Less: Common Stock cash distributions declared									148	111	5
Undistributed net loss									$ (257)	$ (179)	$ (14)
Net loss per common share, basic and diluted (in dollars per share)	$ (0.25)	$ (0.03)	$ (0.08)	$ (0.02)	$ (0.08)	$ (0.08)	$ (0.07)	$ (0.05)	$ (0.38)	$ (0.28)	$ (0.68)
Weighted-average number of common shares outstanding, basic and diluted (in shares)									288,586	246,737	13,718

REAL ESTATE (Narrative) (Detail

REAL ESTATE (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)ft²property	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Real Estate Properties [Line Items]
Allowance for doubtful accounts	$ 54	$ 161	$ 31
Bad debt expense reserve	$ 42
Provision For Doubtful Accounts, Percentage of Base Rent	1.00%
Office Properties
Real Estate Properties [Line Items]
Number of real estate properties | property	4
Rentable square feet | ft²	683,952
Percentage of portfolio occupied	93.00%

REAL ESTATE (Summary of Investm

REAL ESTATE (Summary of Investments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Real Estate Properties [Line Items]
Total Real Estate at Cost	$ 190,751	$ 190,756
Accumulated Depreciation and Amortization	(17,116)	(9,627)
Total real estate, net	$ 173,635	$ 181,129
Von Karman Tech Center | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Aug. 12, 2015
Total Real Estate at Cost	$ 20,380
Accumulated Depreciation and Amortization	(1,688)
Total real estate, net	$ 18,692
Commonwealth Building | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Jun. 30, 2016
Total Real Estate at Cost	$ 77,262
Accumulated Depreciation and Amortization	(7,913)
Total real estate, net	$ 69,349
The Offices at Greenhouse | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Nov. 14, 2016
Total Real Estate at Cost	$ 47,241
Accumulated Depreciation and Amortization	(5,163)
Total real estate, net	$ 42,078
Institute Property | Office Properties
Real Estate Properties [Line Items]
Date Acquired	Nov. 9, 2017
Total Real Estate at Cost	$ 45,868
Accumulated Depreciation and Amortization	(2,352)
Total real estate, net	$ 43,516

REAL ESTATE (Concentration of C

REAL ESTATE (Concentration of Credit Risk, Tenant Lease that Represents More than 10% of Annualized Base Rent) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)ft²$ / ft²	Dec. 31, 2017USD ($)
Concentration Risk [Line Items]
Total Real Estate, Net	$ 173,635	$ 181,129
Von Karman Tech Center | Assets, Total
Concentration Risk [Line Items]
Rentable Square Feet | ft²	101,161
Total Real Estate, Net	$ 18,692
Percentage of Total Assets	10.10%
Annualized Base Rent	$ 2,007
Average Annualized Base Rent per sq. ft. | $ / ft²	22.63
Occupancy	87.60%
Commonwealth Building | Assets, Total
Concentration Risk [Line Items]
Rentable Square Feet | ft²	224,122
Total Real Estate, Net	$ 69,349
Percentage of Total Assets	37.40%
Annualized Base Rent	$ 5,849
Average Annualized Base Rent per sq. ft. | $ / ft²	27.10
Occupancy	96.30%
The Offices at Greenhouse | Assets, Total
Concentration Risk [Line Items]
Rentable Square Feet | ft²	203,284
Total Real Estate, Net	$ 42,078
Percentage of Total Assets	22.70%
Annualized Base Rent	$ 4,201
Average Annualized Base Rent per sq. ft. | $ / ft²	20.66
Occupancy	100.00%
Institute Property | Assets, Total
Concentration Risk [Line Items]
Rentable Square Feet | ft²	155,385
Total Real Estate, Net	$ 43,516
Percentage of Total Assets	23.40%
Annualized Base Rent	$ 3,306
Average Annualized Base Rent per sq. ft. | $ / ft²	26.33
Occupancy	80.80%

REAL ESTATE (Operating Leases)

REAL ESTATE (Operating Leases) (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Leased Assets [Line Items]
Deferred rent recognized	$ 1,083	$ 898	$ 500
Deferred rent receivables	2,900	1,800
Unamortized lease incentives	200	200
Other liabilities, at fair value
Operating Leased Assets [Line Items]
Security deposit liability	$ 1,100	$ 1,200
Maximum
Operating Leased Assets [Line Items]
Operating leases, term of contract	8 years 4 months 24 days
Weighted Average
Operating Leased Assets [Line Items]
Operating leases, term of contract	4 years

REAL ESTATE (Future Minimum Ren

REAL ESTATE (Future Minimum Rental Income) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Real Estate [Abstract]
2,019	$ 14,692
2,020	14,853
2,021	13,438
2,022	11,449
2,023	7,957
Thereafter	9,426
Future minimum rental income	$ 71,815

REAL ESTATE (Geographic Concent

REAL ESTATE (Geographic Concentration Risk) (Narrative) (Details) - Customer Concentration Risk $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)ft²extension$ / ft²
Concentration Risk [Line Items]
Annualized base rent | $	$ 3
Average annualized base rent per square foot | $ / ft²	21.39
Annualized Rent
Concentration Risk [Line Items]
Percentage of total assets	20.00%
Rentable Square Feet
Concentration Risk [Line Items]
Percentage of total assets	21.00%
Net rentable area	140,922
Expires on July 24, 2019
Concentration Risk [Line Items]
Tenant lease, extension option | extension	2
Tenant lease, extension period	3 years
Expires on July 24, 2019 | Rentable Square Feet
Concentration Risk [Line Items]
Net rentable area	5,195
Expires on December 31, 2024
Concentration Risk [Line Items]
Tenant lease, extension option | extension	2
Tenant lease, extension period	5 years
Expires on December 31, 2024 | Rentable Square Feet
Concentration Risk [Line Items]
Net rentable area	135,727

REAL ESTATE (Highes Tenant Indu

REAL ESTATE (Highes Tenant Industry Concentrations- Grater than 10% of Annual Base Rent) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)tenant
Concentration Risk [Line Items]
Number of Tenants	73
Professional, scientific and technical
Concentration Risk [Line Items]
Number of Tenants	12
Annualized Base Rent | $	$ 5,866
Percentage of Annualized Base Rent	38.20%
Information technology
Concentration Risk [Line Items]
Number of Tenants	9
Annualized Base Rent | $	$ 2,093
Percentage of Annualized Base Rent	13.60%

TENANT ORIGINATION AND ABSORP_3

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Abstract]
Tenant Origination And Absorption Costs, Cost	$ 15,981	$ 17,047
Tenant Origination and Absorption Costs, Accumulated Amortization	(5,848)	(3,480)
Tenant Origination and Absorption Costs, Net Amount	10,133	13,567
Above-Market Lease Assets, Cost	213	213
Above-Market Lease Assets, Accumulated Amortization	(63)	(33)
Above-Market Lease Assets, Net Amount	150	180
Below-Market Lease Liabilities, Cost	(7,072)	(7,838)
Below-Market Lease Liabilities, Accumulated Amortization	3,204	1,928
Below-Market Lease Liabilities, Net Amount	(3,868)	(5,910)
Tenant Origination and Absorption Costs, Amortization	(3,434)	(2,826)	$ (1,135)
Above-Market Lease Assets, Amortization	(30)	(30)	(4)
Below-Market Lease Liabilities, Amortization	$ 2,042	$ 1,514	$ 712

TENANT ORIGINATION AND ABSORP_4

TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES (Remaining Unamortized Balance) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Fiscal Year Maturity
2,019	$ 1,278
2,020	1,032
2,021	596
2,022	450
2,023	198
Thereafter	314
Net Amount	3,868
Tenant Origination and Absorption Costs
Fiscal Year Maturity
2,019	(2,589)
2,020	(2,224)
2,021	(1,768)
2,022	(1,498)
2,023	(962)
Thereafter	(1,092)
Net Amount	$ (10,133)
Fiscal Year Maturity
Weighted-Average Remaining Amortization Period	4 years 10 months 24 days
Above-Market Lease Assets
Fiscal Year Maturity
2,019	$ (30)
2,020	(28)
2,021	(21)
2,022	(21)
2,023	(21)
Thereafter	(29)
Net Amount	$ (150)
Fiscal Year Maturity
Weighted-Average Remaining Amortization Period	6 years
Below-Market Lease Liabilities
Fiscal Year Maturity
Weighted-Average Remaining Amortization Period	4 years 2 months 12 days

NOTES PAYABLE (Schedule of Long

NOTES PAYABLE (Schedule of Long-term Debt Instruments) (Details)	Jan. 18, 2018USD ($)	Dec. 31, 2018USD ($)extension	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Notes payable principal outstanding		$ 117,800,000	$ 113,800,000
Deferred financing costs, net		(967,000)	(1,020,000)
Notes payable, net		116,833,000	112,780,000
Face amount of debt		117,800,000	113,800,000
Term Loan
Debt Instrument [Line Items]
Notes payable principal outstanding		$ 72,800,000	72,800,000
Effective Interest Rate		4.16%
Maturity Date		Nov. 9, 2020
Term Loan | Secured Debt | One-month LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		2.00%
Mortgages | Commonwealth Building Mortgage Loan
Debt Instrument [Line Items]
Notes payable principal outstanding		$ 45,000,000	$ 41,000,000
Effective Interest Rate		4.15%
Maturity Date		Feb. 1, 2023
Face amount of debt	$ 51,400,000
Extinguishment of debt, amount	$ 41,000,000
LIBOR benchmark to enter into derivative contract	2.90%
Period to enter into derivative contract	30 days
LIBOR strike rate for derivative contract	3.90%
Number of extensions | extension		2
Extension period		1 year
Loan, amount outstanding		$ 45,000,000
Unused borrowing capacity, amount		$ 6,400,000
Mortgages | Commonwealth Building Mortgage Loan | One-month LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		1.80%
Secured Debt | Term Loan
Debt Instrument [Line Items]
Number of extensions | extension		2
Extension period		1 year
Loan, amount outstanding		$ 48,500,000
Secured Debt | Term Loan | Revolving Credit Facility
Debt Instrument [Line Items]
Loan, amount outstanding		$ 24,300,000

NOTES PAYABLE (Narrative) (Deta

NOTES PAYABLE (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Interest expense	$ 5,302	$ 3,287	$ 1,224
Interest payable, current	400	300
Amortization of deferred financing costs	344	725	162
Debt refinancing costs	200
Not Designated as Hedging Instrument | Interest Rate Swap
Debt Instrument [Line Items]
Unrealized loss (gain) on derivatives	100	(200)
Interest Expense
Debt Instrument [Line Items]
Amortization of deferred financing costs	$ 300	$ 700	$ 200

NOTES PAYABLE (Schedule of Matu

NOTES PAYABLE (Schedule of Maturities of Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,019	$ 0
2,020	72,800
2,021	0
2,022	0
2,023	45,000
Thereafter	0
Total notes payable principal outstanding	$ 117,800	$ 113,800

DERIVATIVE INSTRUMENTS (Notiona

DERIVATIVE INSTRUMENTS (Notional Amount) (Details) - Derivative instruments not designated as hedging instruments - Interest Rate Swap $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)investment	Dec. 31, 2017USD ($)investment
Derivative [Line Items]
Number of Instruments | investment	2	1
Notional Amount	$ 78,533	$ 48,533
Weighted-Average Fix Pay Rate	2.36%
Weighted-Average Remaining Term in Years	3 years 2 months 18 days
Will become effective on April 1, 2019
Derivative [Line Items]
Notional Amount	$ 30,000
Minimum | One-month LIBOR
Derivative [Line Items]
Reference Rate	2.07%
Maximum | One-month LIBOR
Derivative [Line Items]
Reference Rate	2.82%

DERIVATIVE INSTRUMENTS (Balance

DERIVATIVE INSTRUMENTS (Balance Sheet) (Details) - Derivative instruments not designated as hedging instruments - Interest Rate Swap $ in Thousands	Dec. 31, 2018USD ($)Investmentsinvestment	Dec. 31, 2017USD ($)Investmentsinvestment
Derivative [Line Items]
Number of Instruments | investment	2	1
Prepaid expenses and other assets, at fair value
Derivative [Line Items]
Number of Instruments | Investments	1	1
Asset, Fair Value | $	$ 501	$ 178
Other liabilities, at fair value
Derivative [Line Items]
Number of Instruments | Investments	1	0
Liability, Fair Value | $	$ (409)	$ 0

DERIVATIVE INSTRUMENTS (Stateme

DERIVATIVE INSTRUMENTS (Statement of Operations) (Details) - Derivative instruments not designated as hedging instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Increase (decrease) in interest expense as a result of derivatives	$ 65	$ (178)	$ 0
Interest Rate Swap
Derivative [Line Items]
Realized gain recognized on interest rate swaps	(21)	0	0
Unrealized loss (gain) on interest rate swaps	$ 86	$ (178)	$ 0

FAIR VALUE DISCLOSURES (Values)

FAIR VALUE DISCLOSURES (Values) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes payable, Face Value	$ 117,800,000	$ 113,800,000
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes payable, Value	116,833,000	112,780,000
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes payable, Value	$ 118,911,000	$ 114,327,000

FAIR VALUE DISCLOSURES (Schedul

FAIR VALUE DISCLOSURES (Schedule of Assets at Fair Value) (Details) - Recurring Basis - Interest Rate Swap $ in Thousands	Dec. 31, 2018USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivative - interest rate swap	$ 501
Liability derivative - interest rate swap	(409)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivative - interest rate swap	0
Liability derivative - interest rate swap	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivative - interest rate swap	501
Liability derivative - interest rate swap	(409)
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset derivative - interest rate swap	0
Liability derivative - interest rate swap	$ 0

RELATED PARTY TRANSACTIONS (Rel

RELATED PARTY TRANSACTIONS (Related-party Costs) (Details) - USD ($) $ in Thousands	Aug. 09, 2017	Aug. 08, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Related Party Transaction [Line Items]
Payable as of			$ 3,641	$ 1,787		$ 3,641
KBS Capital Advisors LLC
Related Party Transaction [Line Items]
Payable as of			1,300			1,300
Deferred fees						2,300
Advisor and Dealer Manager
Related Party Transaction [Line Items]
Incurred			2,222	1,058	$ 8,665
Payable as of			3,641	1,787		3,641
Advisor and Dealer Manager | Asset Management Fees
Related Party Transaction [Line Items]
Expenses			1,855	632	399
Payable as of			2,274	418		2,274
Advisor and Dealer Manager | Reimbursable Operating Expenses
Related Party Transaction [Line Items]
Expenses			197	185	151
Payable as of			16	18		16
Advisor and Dealer Manager | Property Management Fees
Related Party Transaction [Line Items]
Expenses			170	124	68
Payable as of			13	13		13
Advisor and Dealer Manager | Real Estate Acquisition Fee
Related Party Transaction [Line Items]
Expenses			0	0	2,316
Payable as of			0	0		0
Advisor and Dealer Manager | Advisor Advance for Cash Distributions
Related Party Transaction [Line Items]
Incurred			0	0	1,139
Payable as of			1,338	1,338		1,338
Advisor and Dealer Manager | Selling Commissions
Related Party Transaction [Line Items]
Incurred			0	78	3,029
Payable as of			0	0		0
Advisor and Dealer Manager | Dealer Manager Fees
Related Party Transaction [Line Items]
Incurred			0	51	1,134
Payable as of			0	0		0
Advisor and Dealer Manager | Stockholder Servicing Fees
Related Party Transaction [Line Items]
Incurred			0	(26)	37
Payable as of			0	0		0
Advisor and Dealer Manager | Reimbursable Other Offering Costs
Related Party Transaction [Line Items]
Incurred			0	14	$ 392
Payable as of			$ 0	$ 0		$ 0
KBS Capital Advisors LLC | Cost of Investments
Related Party Transaction [Line Items]
Asset management fee, percent fee	1.00%	1.60%

RELATED PARTY TRANSACTIONS (Nar

RELATED PARTY TRANSACTIONS (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Payment for administrative fees	$ 200,000	$ 200,000	$ 100,000
Limit of total operating expenses as a percent of net income for the four most recently completed fiscal quarters		2.00%
Limit of total operating expenses as a percent of average invested assets		25.00%
Due to affiliates	3,641,000	$ 1,787,000
KBS Capital Advisors LLC
Related Party Transaction [Line Items]
Due to affiliates	1,300,000
KBS Capital Advisors LLC | Property Insurance Rebate
Related Party Transaction [Line Items]
Reimbursement	$ 10,655	$ 8,932	$ 3,670

RELATED PARTY TRANSACTIONS (Rea

RELATED PARTY TRANSACTIONS (Real Estate Property Co-Management Agreement) (Details) - KBS Management Group, LLC [Member]	12 Months Ended
	Dec. 31, 2018
Related Party Transaction [Line Items]
Initial term of management agreements	1 year
Successive periods, renewal	1 year
Period of termination notice	30 days
Period of termination notice with cause	5 days
Von Karman Tech Center
Related Party Transaction [Line Items]
Annual Fee Percentage	1.50%
Commonwealth Building
Related Party Transaction [Line Items]
Annual Fee Percentage	1.25%
The Offices at Greenhouse
Related Party Transaction [Line Items]
Annual Fee Percentage	0.25%
Institute Property
Related Party Transaction [Line Items]
Annual Fee Percentage	1.00%

RELATED PARTY TRANSACTIONS (Org

RELATED PARTY TRANSACTIONS (Organization and Offering Costs) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)
Public Offering
Related Party Transaction [Line Items]
Organization and offering costs recorded by the company	$ 39,358
Initial Private Offering
Related Party Transaction [Line Items]
Other organization and offering costs	$ 1,500,000
KBS Capital Advisors LLC, Dealer Manager and their Affiliates | Maximum
Related Party Transaction [Line Items]
Reimbursable offering costs determination, gross offering costs, percentage	1.00%
KBS Capital Advisors LLC | Public Offering
Related Party Transaction [Line Items]
Offering costs, other than selling commissions and dealer manager fees, incurred by advisor	$ 4,400,000
KBS Capital Advisors LLC | Second Private Offering
Related Party Transaction [Line Items]
Incurred	$ 4,300,000

SELECTED QUARTERLY FINANCIAL _3

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								4 Months Ended		8 Months Ended	12 Months Ended			20 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Apr. 30, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Aug. 31, 2017
Class of Stock [Line Items]
Revenues	$ 5,309	$ 5,561	$ 5,729	$ 5,581	$ 4,713	$ 4,028	$ 4,187	$ 4,033				$ 22,180	$ 16,961	$ 6,855
Net loss												(3,601)	(2,199)	(4,089)
Distribution rate per share per day, declared (in dollars per share)									$ 0.00132452	$ 0.00131849	$ 0.00144493				$ 0.00136986
Class A common stock
Class of Stock [Line Items]
Net loss	$ (2,300)	$ (290)	$ (703)	$ (199)	$ (775)	$ (760)	$ (406)	$ (190)				$ (3,492)	$ (2,131)	$ (4,080)
Net loss per common share, basic and diluted (in dollars per share)	$ (0.25)	$ (0.03)	$ (0.08)	$ (0.02)	$ (0.08)	$ (0.08)	$ (0.04)	$ (0.02)				$ (0.38)	$ (0.23)	$ (0.55)
Distributions declared per common share (in dollars per share)	$ 0.133	$ 0.133	$ 0.128	$ 0.119	$ 0.121	$ 0.124	$ 0.125	$ 0.123				$ 0.51295025	$ 0.49373176	$ 0.49999890
Class T common stock
Class of Stock [Line Items]
Net loss	$ (72)	$ (9)	$ (22)	$ (6)	$ (20)	$ (23)	$ (18)	$ (7)				$ (109)	$ (68)	$ (9)
Net loss per common share, basic and diluted (in dollars per share)	$ (0.25)	$ (0.03)	$ (0.08)	$ (0.02)	$ (0.08)	$ (0.08)	$ (0.07)	$ (0.05)				$ (0.38)	$ (0.28)	$ (0.68)
Distributions declared per common share (in dollars per share)	$ 0.133	$ 0.133	$ 0.128	$ 0.119	$ 0.121	$ 0.124	$ 0.1	$ 0.099				$ 0.51295025	$ 0.44464258	$ 0.17462989

SUBSEQUENT EVENTS (Distribution

SUBSEQUENT EVENTS (Distributions and Stock Dividends) (Details) - USD ($) $ / shares in Units, $ in Thousands	Mar. 06, 2019	Mar. 01, 2019	Feb. 04, 2019	Jan. 02, 2019	Apr. 30, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Aug. 31, 2017
Subsequent Event [Line Items]
Distributions declared								$ 4,872	$ 4,583	$ 3,655
Distribution rate per share per day, declared (in dollars per share)					$ 0.00132452	$ 0.00131849	$ 0.00144493				$ 0.00136986
Subsequent Event | Dividend Paid
Subsequent Event [Line Items]
Distributions declared		$ 400	$ 500	$ 400
Subsequent Event | Dividend Declared
Subsequent Event [Line Items]
Distribution rate per share per day, declared (in dollars per share)	$ 0.00151233

SCHEDULE III REAL ESTATE ASSE_2

SCHEDULE III REAL ESTATE ASSETS AND ACCUMULATED DEPRECIATION AND AMORTIZATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Real Estate and Accumulated Depreciation [Line Items]
Initial Cost to Company, Land	$ 31,309
Initial Cost to Company, Building and Improvements	156,592
Initial Cost to Company, Total	187,901
Cost Capitalized Subsequent to Acquisition	2,850
Gross Amount at which Carried at Close of Period, Land	31,309
Gross Amount at which Carried at Close of Period, Building and Improvements	159,442
Gross Amount at which Carried at Close of Period, Total	190,751	$ 190,756	$ 141,872	$ 21,421
Accumulated Depreciation and Amortization	(17,116)	(9,627)	$ (3,292)	$ (341)
Aggregate cost of real estate for federal income tax purposes	189,400
Notes payable principal outstanding	117,800	113,800
Term Loan
Real Estate and Accumulated Depreciation [Line Items]
Notes payable principal outstanding	$ 72,800	$ 72,800
Von Karman Tech Center
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percent	100.00%
Initial Cost to Company, Land	$ 10,600
Initial Cost to Company, Building and Improvements	10,799
Initial Cost to Company, Total	21,399
Cost Capitalized Subsequent to Acquisition	(1,019)
Gross Amount at which Carried at Close of Period, Land	10,600
Gross Amount at which Carried at Close of Period, Building and Improvements	9,780
Gross Amount at which Carried at Close of Period, Total	20,380
Accumulated Depreciation and Amortization	$ (1,688)
Original Date of Construction	1,980
Date Acquired	Aug. 12, 2015
Commonwealth Building
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percent	100.00%
Encumbrances	$ 45,000
Initial Cost to Company, Land	7,300
Initial Cost to Company, Building and Improvements	66,544
Initial Cost to Company, Total	73,844
Cost Capitalized Subsequent to Acquisition	3,418
Gross Amount at which Carried at Close of Period, Land	7,300
Gross Amount at which Carried at Close of Period, Building and Improvements	69,962
Gross Amount at which Carried at Close of Period, Total	77,262
Accumulated Depreciation and Amortization	$ (7,913)
Original Date of Construction	1,948
Date Acquired	Jun. 30, 2016
The Offices at Greenhouse
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percent	100.00%
Initial Cost to Company, Land	$ 5,009
Initial Cost to Company, Building and Improvements	41,595
Initial Cost to Company, Total	46,604
Cost Capitalized Subsequent to Acquisition	637
Gross Amount at which Carried at Close of Period, Land	5,009
Gross Amount at which Carried at Close of Period, Building and Improvements	42,232
Gross Amount at which Carried at Close of Period, Total	47,241
Accumulated Depreciation and Amortization	$ (5,163)
Original Date of Construction	2,014
Date Acquired	Nov. 14, 2016
Institute Place
Real Estate and Accumulated Depreciation [Line Items]
Ownership Percent	100.00%
Initial Cost to Company, Land	$ 8,400
Initial Cost to Company, Building and Improvements	37,654
Initial Cost to Company, Total	46,054
Cost Capitalized Subsequent to Acquisition	(186)
Gross Amount at which Carried at Close of Period, Land	8,400
Gross Amount at which Carried at Close of Period, Building and Improvements	37,468
Gross Amount at which Carried at Close of Period, Total	45,868
Accumulated Depreciation and Amortization	$ (2,352)
Original Date of Construction	1,908
Date Acquired	Nov. 9, 2017

SCHEDULE III REAL ESTATE ASSE_3

SCHEDULE III REAL ESTATE ASSETS AND ACCUMULATED DEPRECIATION AND AMORTIZATION (Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate:
Balance at the beginning of the year	$ 190,756	$ 141,872	$ 21,421
Acquisitions	0	46,054	120,448
Improvements	1,921	4,096	185
Write off of fully depreciated and fully amortized assets	(1,926)	(1,266)	(48)
Loss due to property damage	0	0	(134)
Balance at the end of the year	190,751	190,756	141,872
Accumulated depreciation and amortization:
Balance at the beginning of the year	9,627	3,292	341
Depreciation and amortization expense	9,415	7,601	2,999
Write off of fully depreciated and fully amortized assets	(1,926)	(1,266)	(48)
Balance at the end of the year	$ 17,116	$ 9,627	$ 3,292