Star Equity (STRR) 10-Q 20 May 24 2024 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2024	May 15, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-35947
Entity Registrant Name	Star Equity Holdings, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	33-0145723
Entity Address, Address Line One	53 Forest Ave., Suite 101,
Entity Address, City or Town	Old Greenwich
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06870
City Area Code	203
Local Phone Number	489-9500
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Outstanding		15,848,202
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Central Index Key	0000707388
Common Stock, par value $0.0001 per share
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	STRR
Security Exchange Name	NASDAQ
Series A Cumulative Perpetual Preferred Stock, par value $0.0001 per share
Entity Information [Line Items]
Title of 12(b) Security	Series A Cumulative Perpetual Preferred Stock, par value $0.0001 per share
Trading Symbol	STRRP
Security Exchange Name	NASDAQ
Series C Participating Preferred Stock, par value $0.0001 per share Purchase Rights
Entity Information [Line Items]
Title of 12(b) Security	Series C Participating Preferred Stock, par value$0.0001 per share Purchase Rights

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Revenues:
Total revenues		$ 9,118	$ 12,346
Cost of revenues:
Total cost of revenues		7,544	8,080
Gross profit		1,574	4,266
Operating expenses:
Selling, general and administrative		4,094	3,684
Amortization of intangible assets		442	430
Total operating expenses		4,536	4,114
Income (loss) from continuing operations		(2,962)	152
Other income (expense):
Other income (expense), net		399	(109)
Interest income (expense), net		374	(27)
Total other income (expense), net		773	(136)
Income (loss) before income taxes from continuing operations		(2,189)	16
Income tax benefit (provision) from continuing operations		(35)	0
Income (loss) from continuing operations, net of tax		(2,224)	16
Income (loss) from discontinued operations, net of tax (Note 2)		0	419
Net income (loss)		(2,224)	435
Dividend on Series A perpetual preferred stock		(479)	(479)
Net income (loss) attributable to common shareholders		(2,703)	(44)
Net income (loss) attributable to common shareholders		$ (2,703)	$ (44)
Net income (loss) per share, continuing operations
Basic (in usd per share)	[1]	$ (0.14)	$ 0
Diluted (in usd per share)	[1]	(0.14)	0
Net income (loss) per share, discontinued operations
Basic (in usd per share)	[1]	0	0.03
Diluted (in usd per share)	[1]	0	0.03
Net income (loss) per share
Basic (in usd per share)	[1]	(0.14)	0.03
Diluted (in usd per share)	[1]	(0.14)	0.03
Net income (loss) per share, attributable to common shareholders
Basic (in usd per share)	[1]	(0.17)	0
Diluted (in usd per share)	[1]	$ (0.17)	$ 0
Weighted-average common shares outstanding
Basic (in shares)	[1]	15,842	15,516
Diluted (in shares)	[1]	15,842	15,516
Dividends declared per share of Series A perpetual preferred stock (in usd per share)		$ 0.25	$ 0.25
Series A Preferred Stock
Weighted-average common shares outstanding
Dividends declared per share of Series A perpetual preferred stock (in usd per share)		$ 0.25	$ 0.25
Building Solutions
Revenues:
Total revenues	[2]	$ 9,118	$ 12,346
Cost of revenues:
Total cost of revenues	[2]	7,440	8,017
Investments
Cost of revenues:
Total cost of revenues		$ 104	$ 63
[1] *Earnings per share may not add due to rounding **Formerly known as Construction

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 14,662	$ 18,326
Restricted cash	615	620
Investments in equity securities	5,575	4,838
Lumber derivative contracts	0	19
Accounts receivable, net of allowances of $206 and $191, respectively	4,584	6,004
Note receivable, current portion	399	399
Inventories, net	4,720	3,420
Other current assets	829	1,180
Assets held for sale	4,295	4,346
Total current assets	35,679	39,152
Property and equipment, net	3,537	3,482
Operating lease right-of-use assets, net	1,371	1,470
Intangible assets, net	12,067	12,518
Goodwill	4,438	4,438
Cost method investment	6,000	6,000
Notes receivable	8,528	8,427
Other assets	29	9
Total assets	71,649	75,496
Current liabilities:
Accounts payable	1,503	1,571
Accrued liabilities	1,028	1,506
Accrued compensation	1,018	1,772
Accrued warranty	45	44
Lumber derivative contracts	1	0
Deferred revenue	1,696	1,377
Short-term debt	1,924	2,019
Operating lease liabilities	411	403
Finance lease liabilities	35	42
Total current liabilities	7,661	8,734
Deferred tax liabilities	320	318
Operating lease liabilities, net of current portion	995	1,102
Finance lease liabilities, net of current portion	34	43
Total liabilities	9,010	10,197
Commitments and contingencies (Note 9)
Stockholders’ Equity:
Common stock, $0.0001 par value: 50,000,000 shares authorized; 15,848,202 and 15,826,217 shares issued and outstanding (net of treasury shares) at March 31, 2024 and December 31, 2023, respectively	2	2
Treasury stock, at cost; 258,849 shares at March 31, 2024 and December 31, 2023, respectively	(5,728)	(5,728)
Additional paid-in capital	159,690	160,126
Accumulated deficit	(110,313)	(108,089)
Total stockholders’ equity	62,639	65,299
Total liabilities and stockholders’ equity	71,649	75,496
Series A Preferred Stock
Stockholders’ Equity:
Preferred stock, $0.0001 par value	18,988	18,988
Series C Participating Preferred Stock, par value $0.0001 per share Purchase Rights
Stockholders’ Equity:
Preferred stock, $0.0001 par value	$ 0	$ 0

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Accounts receivable, allowance for credit loss, current	$ 206,000	$ 191,000
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Liquidation preference (in usd per share)	$ 10
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, authorized (in shares)	50,000,000	50,000,000
Common stock, issued (in shares)	15,848,202	15,826,217
Common stock, outstanding (in shares)	15,848,202	15,826,217
Treasury stock (in shares)	258,849	258,849
Series A Preferred Stock
Preferred stock, shares authorized (in shares)	8,000,000	8,000,000
Liquidation preference (in usd per share)	$ 10	$ 10
Preferred stock, shares issued (in shares)	1,915,637
Preferred stock, outstanding (in shares)	1,915,637
Preferred stock, liquidation preference	$ 18,988,390	$ 18,988,390
Series C Participating Preferred Stock, par value $0.0001 per share Purchase Rights
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	25,000	25,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net income (loss)	$ (2,224)	$ 435
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities:
Depreciation of property and equipment	246	414
Amortization of intangible assets	442	430
Non-cash lease expense	100	349
Provision for bad debt, net	(24)	28
Stock-based compensation	58	102
Amortization of loan issuance costs	0	28
Gain on sale of assets	0	(35)
Deferred income taxes	2	0
Unrealized (gain) loss on equity securities and lumber derivatives	(208)	(45)
Changes in operating assets and liabilities:
Accounts receivable	1,443	2,729
Inventories	(1,300)	584
Other assets	158	413
Accounts payable	(68)	694
Accrued compensation	(754)	323
Deferred revenue and billings in excess of costs and estimated profit	330	(449)
Operating lease liabilities	(108)	(357)
Other liabilities	(478)	(511)
Net cash provided (used) by operating activities	(2,385)	5,132
Investing activities
Purchases of property and equipment	(244)	(136)
Proceeds from sale of property and equipment	0	3
Purchases of equity securities	(509)	(85)
Note receivable repayments	74	0
Net cash provided (used) by investing activities	(679)	(218)
Financing activities
Proceeds from borrowings	4,596	23,299
Repayment of debt	(4,691)	(26,606)
Taxes paid related to net share settlement of equity awards	(15)	0
Repayment of obligations under finance leases	(16)	(139)
Preferred stock dividends paid	(479)	(479)
Net cash provided (used) by financing activities	(605)	(3,925)
Net increase in cash, cash equivalents, and restricted cash including cash within discontinued operations	(3,669)	989
Less: net increase (decrease) in cash classified within discontinued operations	0	371
Net increase (decrease) in cash, cash equivalents, and restricted cash	(3,669)	618
Cash, cash equivalents, and restricted cash at beginning of period	18,946	4,519
Cash, cash equivalents, and restricted cash at end of period	15,277	5,137
Reconciliation of cash, cash equivalents, and restricted cash at end of period
Cash and cash equivalents	14,662	4,996
Restricted cash	615	141
Cash, cash equivalents, and restricted cash at end of period	15,277	5,137
Supplemental Information
Cash paid during the period for interest	20	328
Cash paid during the period for income taxes	$ 34	$ 0

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Perpetual Preferred Stock	Common stock	Treasury Stock	Additional paid-in capital	Accumulated deficit
Preferred stock, beginning balance (in shares) at Dec. 31, 2022		1,916,000
Common stock, beginning balance (in shares) at Dec. 31, 2022			15,178,000
Beginning balance at Dec. 31, 2022	$ 41,755	$ 18,988	$ 1	$ (5,728)	$ 161,715	$ (133,221)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	102				102
Shares issued under stock incentive plans, net of shares withheld for employee taxes (in shares)			15,000
Dividends to holders of preferred stock	(479)				(479)
Net income (loss)	435					435
Preferred stock, ending balance (in shares) at Mar. 31, 2023		1,916,000
Common stock, ending balance (in shares) at Mar. 31, 2023			15,193,000
Ending balance at Mar. 31, 2023	$ 41,813	$ 18,988	$ 1	(5,728)	161,338	(132,786)
Preferred stock, beginning balance (in shares) at Dec. 31, 2023		1,916,000
Common stock, beginning balance (in shares) at Dec. 31, 2023	15,826,217		15,826,000
Beginning balance at Dec. 31, 2023	$ 65,299	$ 18,988	$ 2	(5,728)	160,126	(108,089)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	58				58
Shares issued under stock incentive plans, net of shares withheld for employee taxes (in shares)			22,000
Shares issued under stock incentive plans, net of shares withheld for employee taxes	(15)				(15)
Dividends to holders of preferred stock	(479)				(479)
Net income (loss)	$ (2,224)					(2,224)
Preferred stock, ending balance (in shares) at Mar. 31, 2024		1,916,000
Common stock, ending balance (in shares) at Mar. 31, 2024	15,848,202		15,848,000
Ending balance at Mar. 31, 2024	$ 62,639	$ 18,988	$ 2	$ (5,728)	$ 159,690	$ (110,313)

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Dividends to holders of preferred stock (in usd per share)	$ 0.25	$ 0.25

Basis of Presentation and Signi

Basis of Presentation and Significant Policies	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Significant Policies	Basis of Presentation and Significant Policies Basis of Presentation The unaudited condensed consolidated financial statements included in this Form 10-Q have been prepared in accordance with the U.S. Securities and Exchange Commission (the “SEC”) instructions for Quarterly Reports on Form 10-Q. Accordingly, the condensed consolidated financial statements are unaudited and do not contain all the information required by U.S. generally Accepted Accounting Principles (“GAAP”) to be included in a full set of financial statements. The unaudited condensed Consolidated Balance Sheet at December 31, 2023 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by GAAP for a complete set of financial statements. The audited consolidated financial statements for our fiscal year ended December 31, 2023, filed with the SEC on Form 10-K on March 22, 2024, include a summary of our significant accounting policies and should be read in conjunction with this Form 10-Q. In the opinion of management, all material adjustments necessary to present fairly the results of operations, cash flows, and balance sheets for such periods have been included in this Form 10-Q. All such adjustments related to continuing operations are of a normal recurring nature. The results of operations for interim periods are not necessarily indicative of the results of continuing operations for the entire year. The Company Star Equity Holdings, Inc. (“Star Equity,” the “Company,” “we,” or “our”) is a multi-industry diversified holding company with two divisions: Building Solutions (formerly known as Construction) and Investments. We previously had a Healthcare division which was sold on May 4, 2023, as further described in Note 2. “Discontinued Operations”. Our common stock and preferred stock are listed on the NASDAQ Global Market exchange as “STRR” and “STRRP,” respectively. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and disclosures made in the accompanying notes to the consolidated financial statements. Significant estimates and judgments include those related to revenue recognition, goodwill valuation, business combination accounting, and income taxes. Actual results could materially differ from those estimates. Concentration of Credit Risk Financial instruments, which potentially subject us to concentrations of credit risk, consist primarily of cash and cash equivalents and accounts receivable. We limit our exposure to credit loss by generally placing cash in high credit quality financial institutions or in major money market mutual funds offered through brokerage firms. Some of our cash balances are maintained at major banking institutions in the United States, a portion of which may, from time to time, exceed the regulatory limit of $250,000 insured by the Federal Deposit Insurance Corporation (FDIC). We have not experienced any credit losses associated with our cash balances. Additionally, we have established guidelines regarding diversification of our investments and their maturities, which are designed to maintain principal and maximize liquidity. As of March 31, 2024, we had $0.2 million of cash in excess of FDIC insured limits. New Accounting Standards To Be Adopted No new accounting standards were issued in the quarter ended March 31, 2024 that are expected to have a material impact on our financial statements. Reclassifications Certain balances in the audited consolidated financial statements for our fiscal year ended December 31, 2023 have been reclassified to conform with the current period presentation. Specifically, we have reclassified $4.3 million of net property and equipment to assets held for sale for comparability purposes (see Note 17. “Subsequent Events”).

Discontinued Operations

Discontinued Operations	3 Months Ended
	Mar. 31, 2024
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations On May 4, 2023, we entered into a Stock Purchase and Contribution Agreement (the “Purchase Agreement”), by and among the Company, Digirad Health Inc., a Delaware corporation and wholly owned subsidiary of the Company (“Digirad Health”), TTG Imaging Solutions, LLC, a Pennsylvania limited liability company (“TTG”), and TTG’s parent, Insignia TTG Parent LLC, a Delaware limited liability company (the “Parent”). Pursuant to the Purchase Agreement, (i) TTG purchased 85% of the issued and outstanding shares of Digirad Health, on the terms and subject to the conditions set forth therein and (ii) the Company contributed to Parent 15% of the issued and outstanding shares of stock of Digirad Health (the “Contributed Shares”) in exchange for New Units (as defined in the Purchase Agreement) of Parent (the “TTG Transaction”). The total aggregate consideration payable to the Company for the TTG Transaction was $40 million, comprised of $19.7 million ($27 million less payoff of debt to Webster Bank (see Note 8. “Debt”) and transaction costs) in cash, a $7 million promissory note (see Note 5. “Supplemental Balance Sheet Information”), and $6 million of New Units in the Parent (see Note 5. “Supplementary Balance Sheet Information”). The Company completed the sale of Digirad Health simultaneously with entering into the Purchase Agreement. We deemed the disposition of Digirad Health, which operated our Healthcare business unit, to represent a strategic shift that will have a major effect on our operations and financial results. As of the date of these financial statements, the results of operations of the Healthcare business unit represent “discontinued operations” in accordance with GAAP (ASC 205-20-45-1B). As such, the assets and liabilities, as well as the earnings, of the discontinued operation are presented separately in the unaudited condensed consolidated financial statements for all periods presented. Unless otherwise noted, discussion within the notes to the unaudited condensed consolidated financial statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations relates to continuing operations. Our variable interest entity (“VIE”), for which we are not the primary beneficiary, was disposed of as part of the sale of our Healthcare division. This VIE was in a small private company that is primarily involved in research related to new heart imaging technologies. The following table presents financial results of our Healthcare division for the three months ended March 31, 2024 and 2023 (in thousands). Three Months Ended March 31, 2024 2023 Total revenues $ — $ 13,359 Total cost of revenues — 10,032 Gross profit — 3,327 Operating expenses: Selling, general and administrative — 2,748 Total operating expenses — 2,748 Income (loss) from discontinued operations — 579 Other (expense) income, net — 8 Interest expense, net — (168) Income (loss) from discontinued operations before income taxes — 419 Income tax benefit (provision) — — Income (loss) from discontinued operations $ — $ 419 The following table presents the significant operating, investing and financing activities from discontinued operations for the three months ended March 31, 2024 and 2023 (in thousands): Three Months Ended March 31, 2024 2023 Operating activities Net income (loss) from discontinued operations $ — $ 419 Depreciation — 272 Non-cash lease expense — 273 Write-off of borrowing costs — 10 Share-based compensation — 1 (Gain) Loss on disposal of assets — 219 Provision for bad debt — 11 Deferred income taxes — (176) Accounts receivable — 396 Inventory — (252) Other assets — 119 Accounts payable — 649 Accrued compensation — 574 Deferred revenue — (135) Operating lease liabilities — (289) Other liabilities — (904) Net cash provided by (used in) operating activities — 1,187 Net cash provided by (used in) investing activities — (107) Net cash provided by (used in) financing activities — (709) Net increase (decrease) in cash and cash equivalents and restricted cash $ — $ 371 Following is the reconciliation of purchase price (including a working capital adjustment) to the total gain recognized in income from discontinued operations from the second quarter of 2023 through March 31, 2024 (in thousands): Proceeds of the disposition, net of transaction costs and indebtedness payoff $ 32,756 Assets of the businesses (24,071) Liabilities of the businesses 18,069 Pre-tax gain on the disposition $ 26,754

Revenue

Revenue	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Disaggregation of Revenue The following tables present our continuing revenues disaggregated by major source for the three months ended March 31, 2024 and 2023 (in thousands): Three Months Ended March 31, 2024 Three Months Ended March 31, 2023 Building Solutions Total Building Solutions Total Major Goods/Service Lines Building Solutions Revenue from Contracts with Customers $ 9,118 $ 9,118 $ 12,346 $ 12,346 Total Revenues $ 9,118 $ 9,118 $ 12,346 $ 12,346 Timing of Revenue Recognition Services and goods transferred at a point in time 9,118 9,118 12,346 12,346 Total Revenues $ 9,118 $ 9,118 $ 12,346 $ 12,346 Deferred Revenue Changes in deferred revenue, which consist primarily of customer deposits, for the three months ended March 31, 2024 are as follows (in thousands): Balance at December 31, 2023 $ 1,377 Revenue recognized that was included in balance at beginning of the year (1,211) Deferred revenue, net, related to contracts entered into during the year 1,530 Balance at March 31, 2024 $ 1,696

Basic and Diluted Net Income (L

Basic and Diluted Net Income (Loss) Per Share	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Basic and Diluted Net Income (Loss) Per Share	Basic and Diluted Net Income (Loss) Per Share We present net income (loss) per share attributable to common stockholders in conformity with the two-class method required for participating securities, as the warrants are considered participating securities. We have not allocated net income (loss) attributable to common stockholders to warrants because the holders of our warrants are not contractually obligated to share in our income (loss). Basic net income (loss) per share attributable to common stockholders is computed by dividing net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share attributable to common stockholders is calculated to give effect to all potential shares of common stock, including common stock issuable upon exercise of warrants, stock options, and restricted stock units (“RSUs”). In periods for which there is a net loss, diluted loss per common share is equal to basic loss per common share, since the effect of including any common stock equivalents would be antidilutive. The following table sets forth the reconciliation of shares used to compute basic and diluted net income (loss) per share for the periods indicated (in thousands): Three Months Ended March 31, 2024 2023 Numerator: Income (loss) from continuing operations, net of tax $ (2,224) $ 16 Income (loss) from discontinued operations, net of tax (Note 2) — 419 Net income (loss) (2,224) 435 Dividend on Series A perpetual preferred stock (479) (479) Net income (loss) attributable to common shareholders $ (2,703) $ (44) Denominator: Weighted average common shares outstanding 15,842 15,191 Weighted average prefunded warrants outstanding — 325 Weighted average shares outstanding - basic and diluted 15,842 15,516 Antidilutive common stock equivalents are excluded from the computation of diluted income (loss) per share. The computation of diluted earnings per share excludes stock options, RSUs, and stock warrants that are antidilutive. The following common stock equivalents were antidilutive (in thousands): Three Months Ended March 31, 2024 2023 Stock options — 2 Restricted stock units 85 80 Stock warrants 11,865 11,865 Total 11,950 11,947

Supplementary Balance Sheet Inf

Supplementary Balance Sheet Information	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplementary Balance Sheet Information	Supplementary Balance Sheet Information Inventories The components of inventories are as follows (in thousands): March 31, 2024 December 31, 2023 Raw materials $ 1,456 $ 1,394 Work-in-process 414 410 Finished goods 2,850 1,616 Total inventories 4,720 3,420 Less reserve for excess and obsolete inventories — — Total inventories, net $ 4,720 $ 3,420 Property and Equipment Property and equipment consist of the following (in thousands): March 31, 2024 December 31, 2023 Land $ 548 $ 548 Buildings and leasehold improvements 1,063 1,063 Machinery and equipment 3,709 3,474 Gross property and equipment 5,320 5,085 Accumulated depreciation (1,783) (1,603) Total property and equipment, net $ 3,537 $ 3,482 As of March 31, 2024, the non-operating land and buildings, held for investments, had a carry value of $1.0 million and was included within property and equipment on the condensed Consolidated Balance Sheet. Warranty Reserves Within our Building Solutions division, KBS Builders, Inc. (“KBS”) provides a limited assurance warranty on its residential homes that covers substantial defects in materials or workmanship for a period of 12 months after delivery to the owner. EdgeBuilder, Inc. (“EdgeBuilder”) provides a limited warranty on the sale of its wood foundation products that covers leaks resulting from defects in workmanship for a period of twenty-five years. Estimated warranty costs are accrued in the period that the related revenue is recognized. Notes Receivable Notes receivable consists of the following principal and interest balances as of March 31, 2024 and December 31, 2023 (in thousands): March 31, 2024 December 31, Principal and interest Principal and interest TTG Note $ 7,634 $ 7,459 MDOS Note 1,117 1,192 KBS Customer Note 176 176 $ 8,927 $ 8,827 As a part of the TTG Transaction described further in Note 2. “Discontinued Operations,” a $7 million promissory note was entered into which represents an unsecured note receivable on our balance sheet. The note has a maturity date of May 3, 2029 with payment-in-kind (non-cash) interest on the outstanding principal balance hereof to accrue at the Interest Rate. The full balance is scheduled to be paid at the maturity date. The Interest Rate is defined as (i) during the period from the date of issuance of the note through the third anniversary of the date of issuance of the note, a per annum rate equal to the sum of (x) 5.0% per annum plus (y) the greater of 5.0% per annum and the weighted average term SOFR-based interest rate of outstanding loans under the Senior Loan Agreement (as defined in the Purchase Agreement) during such period, and (ii) during the period following the third anniversary of the date of issuance of the note, a per annum rate equal to the sum of (x) 5.0% per annum plus (y) the greater of 7.0% per annum and the weighted average term SOFR-based interest rate of outstanding loans under the Senior Loan Agreement during such period. In 2021 we completed the sale of MD Office Solutions in exchange for a secured promissory note (the “MDOS Note”). This note, the principal of which is approximately $1.1 million at March 31, 2024, is included in “Notes receivable, current portion” and “Notes receivable” in our Consolidated Balance Sheet at March 31, 2024 for $0.2 million and $0.9 million, respectively. The MDOS Note requires quarterly installments of $74 thousand and incurs interest at a fixed rate of 5.0% through maturity in 2028. In 2023, KBS issued a promissory note to a customer, incurring 12% interest per annum (the “KBS Customer Note”). The KBS Customer Note, which has a maturity date with full payment due of September 19, 2024, is included in “Notes receivable, current portion” in the Consolidated Balance Sheets at March 31, 2024. Cost Method Investment As a part of the sale of Digirad Health, we received $6.0 million in the common equity of TTG Parent LLC. We have elected the measurement alternative under ASC 321. The measurement alternative election allows for equity securities that do not have readily determinable fair values to be recorded at cost, with adjustments for impairment and certain observable price changes reflected in earnings. Such securities are adjusted to fair value when an observable price change occurs or impairment is identified. No such impairments were noted as of March 31, 2024.

Leases

Leases	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Leases	Leases Lessee We have operating and finance leases for corporate offices, vehicles, and certain equipment. Our leases have remaining lease terms of 1 year to 10 years, some of which include options to extend the leases and some of which include options to terminate the leases within 1 year. Operating leases and finance leases are included separately in the condensed Consolidated Balance Sheets. The components of lease expense are as follows (in thousands): Three Months Ended March 31, 2024 2023 Operating lease cost $ 116 $ 116 Finance lease cost: Amortization of finance lease assets $ 21 $ 35 Interest on finance lease liabilities 1 5 Total finance lease cost $ 22 $ 40 Supplemental cash flow information related to leases from continuing operations was as follows (in thousands): Three Months Ended March 31, 2024 2023 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 100 $ 95 Operating cash flows from finance leases $ 1 $ 5 Financing cash flows from finance leases $ 16 $ 44 Right-of-use assets obtained in exchange for lease obligations Operating leases $ — $ — Supplemental balance sheet information related to leases was as follows: March 31, 2024 December 31, 2023 Weighted average remaining lease term (in years) Operating leases 3.9 4.3 Finance leases 2.2 2.2 Weighted average discount rate Operating leases 5.41 % 5.46 % Finance leases 5.86 % 5.86 % We are committed to making future cash payments on non-cancelable operating leases and finance leases (including interest). The future minimum lease payments due under both non-cancelable operating leases and finance leases having initial or remaining lease terms in excess of one year as of March 31, 2024 were as follows (in thousands): Operating Leases Finance Leases 2024 (excludes the three months ended March 31, 2024) $ 352 $ 33 2025 477 25 2026 387 16 2027 92 1 2028 94 — 2029 and thereafter 112 — Total future minimum lease payments 1,514 75 Less amounts representing interest 108 6 Present value of lease obligations $ 1,406 $ 69 Lessor
Leases	Leases Lessee We have operating and finance leases for corporate offices, vehicles, and certain equipment. Our leases have remaining lease terms of 1 year to 10 years, some of which include options to extend the leases and some of which include options to terminate the leases within 1 year. Operating leases and finance leases are included separately in the condensed Consolidated Balance Sheets. The components of lease expense are as follows (in thousands): Three Months Ended March 31, 2024 2023 Operating lease cost $ 116 $ 116 Finance lease cost: Amortization of finance lease assets $ 21 $ 35 Interest on finance lease liabilities 1 5 Total finance lease cost $ 22 $ 40 Supplemental cash flow information related to leases from continuing operations was as follows (in thousands): Three Months Ended March 31, 2024 2023 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 100 $ 95 Operating cash flows from finance leases $ 1 $ 5 Financing cash flows from finance leases $ 16 $ 44 Right-of-use assets obtained in exchange for lease obligations Operating leases $ — $ — Supplemental balance sheet information related to leases was as follows: March 31, 2024 December 31, 2023 Weighted average remaining lease term (in years) Operating leases 3.9 4.3 Finance leases 2.2 2.2 Weighted average discount rate Operating leases 5.41 % 5.46 % Finance leases 5.86 % 5.86 % We are committed to making future cash payments on non-cancelable operating leases and finance leases (including interest). The future minimum lease payments due under both non-cancelable operating leases and finance leases having initial or remaining lease terms in excess of one year as of March 31, 2024 were as follows (in thousands): Operating Leases Finance Leases 2024 (excludes the three months ended March 31, 2024) $ 352 $ 33 2025 477 25 2026 387 16 2027 92 1 2028 94 — 2029 and thereafter 112 — Total future minimum lease payments 1,514 75 Less amounts representing interest 108 6 Present value of lease obligations $ 1,406 $ 69 Lessor

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Recurring Basis The Financial Accounting Standards Board’s authoritative guidance for fair value measurements establishes a three-level hierarchy based upon the inputs to the valuation model of an asset or liability. Level 1 inputs are quoted prices in active markets for identical assets; Level 2 inputs are inputs other than quoted prices that are significant and observable; and Level 3 inputs are significant unobservable inputs to be used in situations where markets do not exist or are illiquid. The following table presents information about our financial assets that are measured at fair value on a recurring basis, and indicates the fair value hierarchy of the valuation techniques we utilize to determine such fair value at March 31, 2024 and December 31, 2023 (in thousands): Fair Value as of March 31, 2024 Level 1 Level 2 Level 3 Total Assets (Liabilities): Equity securities $ 5,575 $ — $ — $ 5,575 Lumber derivative contracts (1) — — (1) Total $ 5,574 $ — $ — $ 5,574 Fair Value as of December 31, 2023 Level 1 Level 2 Level 3 Total Assets (Liabilities): Equity securities $ 4,838 $ — $ — $ 4,838 Lumber derivative contracts 19 — — 19 Total $ 4,857 $ — $ — $ 4,857 The investment in equity securities consists of common stock of publicly traded companies. The fair value of these securities is based on the closing prices observed on March 31, 2024 and December 31, 2023, respectively, and recorded in “Investments in equity securities” in the condensed Consolidated Balance Sheets. During the three months ended March 31, 2024 and 2023, we recorded an unrealized gain of $228 thousand and $2 thousand, respectively, resulting from market fluctuations, recorded in other income (expense), net in the condensed Consolidated Statements of Operations. We may enter into lumber derivative contracts in order to protect our gross profit margins from fluctuations caused by lumber price volatility. Such contracts, which are generally entered into to protect the gross margins on our wall panel contracts at EdgeBuilder and Glenbrook Building Supply, Inc. (“Glenbrook” and referred to jointly with EdgeBuilder as “EBGL”), are recorded within current assets or liabilities in the condensed Consolidated Balance Sheets. For the three months ended March 31, 2024 and 2023, we recorded a net loss of $4 thousand and $46 thousand, respectively, in the cost of goods sold Gains and losses from lumber derivative contracts are recorded in cost of goods sold of the condensed Consolidated Statements of Operations and included the following for the three months ended March 31, 2024 and 2023, respectively: March 31, 2024 March 31, 2023 Unrealized gain (loss) on lumber derivatives $ (20) $ (43) Realized gain (loss) on lumber derivatives 16 89 Total gain (loss) on lumber derivatives $ (4) $ 46 Gains and losses from investments in equity securities are recorded in other income (expense) of the condensed Consolidated Statements of Operations and included the following for the three months ended March 31, 2024 and 2023, respectively: March 31, 2024 March 31, 2023 Unrealized gain (loss) on equity securities $ 228 $ 2 Realized gain (loss) on equity securities — — Total gain (loss) on equity securities $ 228 $ 2

Debt

Debt	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Debt	Debt A summary of debt as of March 31, 2024 and December 31, 2023 is as follows (dollars in thousands): March 31, 2024 December 31, 2023 Amount Weighted-Average Interest Rate Amount Weighted-Average Interest Rate Revolving Credit Facility - Premier $ 1,924 9.25% $ 2,019 9.25% Total Short-term Revolving Credit Facilities $ 1,924 9.25% $ 2,019 9.25% Total Short-term debt $ 1,924 9.25% $ 2,019 9.25% Premier Facility On August 16, 2023, EdgeBuilder and Glenbrook (referred to herein as the “EBGL Borrowers”), entered into a Revolving Credit Loan Agreement with Premier Bank (“Premier”), which was subsequently amended on December 5, 2023 to provide the EBGL Borrowers with a working capital line of credit of up to $6.0 million (the “Premier Loan Agreement”). Availability under the Premier Loan Agreement is based on a formula tied to the EBGL Borrowers’ eligible accounts receivable, inventory and equipment. Borrowings under the Premier Loan Agreement bear interest at the prime rate plus 0.75% (and a minimum interest rate of 6.75%), with interest payable monthly and the outstanding principal balance payable upon expiration of the term of the Premier Loan Agreement. The Premier Loan Agreement also provides for certain fees payable to Premier during its term. The initial term of the Premier Loan Agreement expires on December 5, 2024 but may be extended from time to time at the request of the EBGL Borrowers, subject to approval by Premier. The EBGL Borrowers’ obligations under the Premier Loan Agreement are guaranteed by the Company and secured by all of their inventory, equipment, accounts and other intangibles. As of March 31, 2024, availability under the Premier Loan Agreement was approximately $2.2 million. Financial covenants associated with the Premier Loan Agreement require that the EBGL Borrowers maintain (a) a debt service coverage ratio for any calendar year of less than 1.25; (b) a debt-to-equity ratio at the end of each calendar year in excess of 1.65; (c) a fixed charge coverage ratio at the end of each calendar year of less than 1.10; (d) working capital of at least $2 million; and (e) a current ratio of at least 1.50. As of December 31, 2023, the EBGL Borrowers were not in compliance with the annual Premier Loan Agreement covenants. The EBGL Borrowers have obtained a waiver from Premier for the annual covenant breach as of December 31, 2023. Webster Credit Facility On March 29, 2019, the Company entered into a Loan and Security Agreement (the “Webster Loan Agreement”) by and among certain subsidiaries of the Company, as borrowers, the Company, as guarantor, and Sterling National Bank (“Sterling”). On February 1, 2022, Sterling became part of Webster Bank, N.A. (“Webster”), and Webster became the successor in interest to the Webster Loan Agreement. The Webster Loan Agreement was also subject to a limited guarantee by Mr. Eberwein, the Executive Chairman of our board of directors. The Webster Loan Agreement was a five-year credit facility maturing in March 2024, with a maximum credit amount of $20.0 million for revolving loans (the “Webster Credit Facility”). In connection with the sale of our Healthcare business on May 4, 2023, we paid all amounts due and closed the Webster Credit Facility. eCapital Credit Facilities The EBGL Borrowers were parties to a Loan and Security Agreement with eCapital Asset Based Lending Corp. (“eCapital”) providing for a $4.0 million credit facility with a maturity date of June 2023 and an auto-renewal of one year thereafter. KBS was a party to a Loan and Security Agreement with eCapital, providing up to $4.0 million in working capital, which was scheduled to mature and renew automatically for a period of one year moving forward. During the second quarter of 2023, we closed these two credit facilities and have no remaining debt balance with eCapital. eCapital Term Loan We and certain of our Investments subsidiaries were party to a Loan and Security Agreement with eCapital, as successor in interest to Gerber Finance, Inc., which provided for a credit facility with borrowing availability of up to $2.5 million, bearing interest at the prime rate plus 3.5% per annum, and maturing on January 31, 2025, unless terminated in accordance with the terms therein. During the second quarter of 2023, we closed this credit facility and have no remaining debt balance with eCapital.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In the normal course of business, we have been and will likely continue to be subject to litigation or administrative proceedings incidental to our business, such as claims related to compliance with regulatory standards, customer disputes, employment practices, wage and hour disputes, product liability, professional liability, malpractice liability, commercial disputes, licensure restrictions or denials, and warranty or patent infringement. Responding to litigation or administrative proceedings, regardless of whether they have merit, can be expensive and disruptive to normal business operations. We are not able to predict the timing or outcome of these matters but currently do not expect that the resolution of these matters will have a material adverse effect on our financial position or results of operations. The outcome of litigation and the amount or range of potential loss at particular points in time may be difficult to ascertain. Among other things, uncertainties can include how trial and appellate courts will apply the law and interpret facts, as well as the contractual and statutory obligations of other indemnifying and insuring parties. The estimated range of reasonably possible losses, and their effect on our financial position is based on currently available information and is subject to significant judgment and a variety of assumptions, as well as known and unknown uncertainties.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We provide for income taxes under the asset and liability method. This approach requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of differences between the tax basis of assets or liabilities and their carrying amounts in the financial statements. We provide a valuation allowance for deferred tax assets if it is more likely than not that these items will expire before we are able to realize their benefit. We calculate the valuation allowance in accordance with the authoritative guidance relating to income taxes, which requires an assessment of both positive and negative evidence regarding the realizability of these deferred tax assets, when measuring the need for a valuation allowance. Significant judgment is required in determining any valuation allowance against deferred tax assets. We continue to record a full valuation allowance against our deferred tax assets and intend to maintain a valuation allowance until sufficient positive evidence exists to support its reversal. Intraperiod tax allocation rules require us to allocate our provision for income taxes between continuing operations and other categories of comprehensive income, such as discontinued operations. For the three months ended March 31, 2024, we recorded an income tax expense of $35 thousand within continuing operations. As of March 31, 2024, we had unrecognized tax benefits of approximately $0.3 million related to uncertain tax positions. Included in the unrecognized tax benefits were $0.3 million of tax benefits that, if recognized, would reduce our annual effective tax rate, subject to the valuation allowance.

Segments

Segments	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
Segments	Segments Our reportable segments are based upon our internal organizational structure, the manner in which our operations are managed, the criteria used by our Chief Executive Officer, who is our Chief Operating Decision Maker (“CODM”), to evaluate segment performance, the availability of separate financial information, and overall materiality considerations. Effective as of the consummation of the sale of our Healthcare business on May 4, 2023, our business divisions are organized into the following two reportable segments, reflecting the manner in which our CODM assesses performance and allocates resources: 1. Building Solutions 2. Investments Prior to the sale of Digirad Health on May 4, 2023, we also had a Healthcare segment. Our reporting segments have been determined based on the nature of the products and services offered to customers or the nature of their function in the organization. We evaluate performance based on gross profit and operating income (loss). Our operating costs included in our shared service functions primarily consist of senior executive officers, finance, human resources, legal, and information technology. Star Equity shared service corporate costs have been separated from the reportable segments. Prior period presentation previously disclosed conforms to current year presentation. Segment information for the three months ended March 31, 2024 and 2023 is as follows (in thousands): Three Months Ended March 31, 2024 2023 Revenue by segment: Building Solutions $ 9,118 $ 12,346 Investments 188 158 Intersegment elimination (188) (158) Consolidated revenue $ 9,118 $ 12,346 Gross profit (loss) by segment: Building Solutions $ 1,678 $ 4,329 Investments 84 95 Intersegment elimination (188) (158) Consolidated gross profit $ 1,574 $ 4,266 Income (loss) from operations by segment: Building Solutions $ (898) $ 1,782 Investments 44 (19) Corporate, eliminations and other (2,108) (1,611) Segment income (loss) from operations $ (2,962) $ 152 Depreciation and amortization by segment: Building Solutions $ 567 $ 505 Investments 104 63 Star Equity corporate 17 4 Total depreciation and amortization $ 688 $ 572

Mergers and Acquisitions

Mergers and Acquisitions	3 Months Ended
	Mar. 31, 2024
Business Combination and Asset Acquisition [Abstract]
Mergers and Acquisitions	Mergers and Acquisitions On October 31, 2023, we acquired, through certain wholly owned subsidiaries, the assets and liabilities of Big Lake Lumber Inc. (“BLL”) for consideration consisting of cash of $2.8 million and an earn-out provision of up to $0.5 million. As a result of this transaction, EBGL expanded its market share of the Greater Minneapolis area. BLL’s operations were integrated into and became part of Glenbrook’s operations. The earn-out provision, which is accounted for as a contingent liability, is based on a specific gross profit threshold with a measurement period of two years to begin one year after the closing date of the acquisition and can potentially amount to up to $0.3 million for each of the two years, subject to certain limitations. The estimated fair value of the earn-out, which is determined using estimates of forecasted operations and other assumptions, was $0.2 million as of the acquisition date. No change to the fair value of the earn-out was recorded in Accrued Liabilities on our condensed consolidated balance sheet through March 31, 2024. In accordance with ASC 805, we accounted for this transaction as a business combination and recorded the assets and liabilities of BLL at fair value. The fair value of the net assets acquired amounted to approximately $4.1 million at the date of acquisition, and as a result, we recorded a gain of $1.2 million on our 2023 Consolidated Statement of Operations related to the excess of the fair value of the net assets acquired over the acquisition price. This excess is referred to as a “bargain purchase.” This bargain purchase indicates that the fair value of the net assets acquired (which represents the price that the assets would be exchanged between a willing buyer and seller) was in excess of the amount for which we acquired such net assets. As a result of the bargain purchase, we reassessed the recognition and measurement of net identifiable assets acquired and determined the valuation procedures applied and resulting measurements of the net identifiable assets were appropriate. We believe the seller was motivated to complete the sale as part of its overall business strategy of exiting the market segment. The following table sets forth the purchase price allocation of BLL to the estimated fair value of assets acquired as of the acquisition date (in thousands): As of Acquisition date Purchase Price Cash Paid to Sellers $ 2,770 Fair Value of Earn-out Provision 169 Total consideration 2,939 Purchase Price allocation Inventories, net 438 Accounts receivable 578 Property and equipment 2,654 Intangible assets 900 Deferred tax liability (461) Fair value allocated to net assets acquired 4,109 Bargain purchase gain $ (1,170) The following unaudited pro forma combined financial information presents our results as if the BLL acquisition had occurred at the beginning of fiscal 2023 (in thousands): March 31, 2023 (unaudited) Revenue $ 12,901 Gross Profit 4,548 Net income (loss) $ 436

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2024
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions On December 10, 2021, the Company entered into a securities purchase agreement with its Executive Chairman, Jeffrey E. Eberwein, relating to the issuance and sale of 650,000 shares of the Company’s common stock, par value $0.0001 per share (the “Common Stock”) at a purchase price of $3.25 per share pursuant to a private placement. As of March 31, 2024, Mr. Eberwein owned 4,062,485 shares of Common Stock, representing approximately 25.63% of our outstanding Common Stock. In addition, as of March 31, 2024, Mr. Eberwein owned 1,182,414 shares of Series A Preferred Stock.

Perpetual Preferred Stock

Perpetual Preferred Stock	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Perpetual Preferred Stock	Perpetual Preferred Stock Holders of shares of our Series A Preferred Stock are entitled to receive, when, as, and if, authorized by the Company’s board of directors (or a duly authorized committee of the Company’s board of directors) and declared by the Company out of funds legally available for the payment of dividends, preferential cumulative cash dividends at the rate of 10.0% per annum of the liquidation preference of $10.00 per share. Dividends are payable quarterly, in arrears, by the last calendar day of March, June, September and December to holders of record at the close of business on the first day of each payment month. The Series A Preferred Stock is not convertible and does not have any voting rights, except when dividends are in arrears for six or more consecutive quarters, then the holders of those shares together with holders of all other series of preferred stock equal in rank would be entitled to vote separately as a class for the election of two additional directors to board of directors, until all dividends accumulated on such shares of Series A Preferred Stock for the past dividend periods and the dividend for the current dividend period shall have been fully paid or declared and a sum sufficient for the payment thereof set apart for payment. The Company may redeem the Series A Preferred Stock upon the occurrence of a change of control, subject to certain conditions. The Company may also voluntarily redeem some or all of the Series A Preferred Stock on or after September 10, 2024. On February 16, 2024, our board of directors declared a cash dividend to holders of our Series A Preferred Stock of $0.25 per share, for an aggregate amount of approximately $0.5 million. The record date for this dividend payment was March 1, 2024 and the payment date was March 11, 2024. As of March 31, 2024, we are current on our preferred dividend payments. On June 2, 2021, the board of directors adopted a tax benefit preservation plan in the form of a Section 382 Rights Agreement (the “382 Agreement”). The 382 Agreement is intended to diminish the risk that our ability to use our net operating loss carryforwards to reduce future federal income tax obligations may become substantially limited due to an “ownership change,” as defined in Section 382 of the Internal Revenue Code of 1986, as amended. The board of directors authorized and declared a dividend distribution of one right for each outstanding share of Common Stock to stockholders of record as of the close of business on June 14, 2021. Each right entitles the registered holder to purchase from the Company one one-thousandth of a share of Series C Participating Preferred Stock, par value $0.0001 per share (the “Series C Preferred Stock”), at an exercise price of $12.00 per one one-thousandth of a share of Series C Preferred Stock, subject to adjustment. The rights will become exercisable following (i) 10 days after a public announcement that a person or group has become an Acquiring Person (as defined in the 382 Agreement); and (ii) 10 business days (or a later date determined by the board of directors) after a person or group begins a tender or an exchange offer that, if completed, would result in that person or group becoming an Acquiring Person. In addition, upon the occurrence of certain events, the exercise price of the rights would be adjusted and holders of the rights (other than rights owned by an acquiring person or group) would be entitled to purchase common stock at approximately half of market value. Given the potential adjustment of the exercise price of the rights, the rights could cause substantial dilution to a person or group that acquires 4.99% or more of common stock on terms not approved by the board of directors. No rights were exercisable at March 31, 2024. There is no impact to financial results as a result of the adoption of the 382 Agreement for the three months ended March 31, 2024.

Equity Transactions

Equity Transactions	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Equity Transactions	Equity Transactions As of March 31, 2024, of the warrants issued through the public offering we closed on May 28, 2020, 1.0 million warrants were exercised and 1.4 million warrants remained outstanding, which represents 0.7 million shares of common stock equivalents, at an exercise price of $2.25. As of March 31, 2024, of the warrants issued through the public offering we closed on January 24, 2022, There were 10.9 million warrants outstanding at an exercise price of $1.50 and no prefunded warrants outstanding. The 0.3 million prefunded warrants were exercised at $0.01 per share in the third quarter of 2023.

Preferred Stock Rights

Preferred Stock Rights	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Preferred Stock Rights	Perpetual Preferred Stock Holders of shares of our Series A Preferred Stock are entitled to receive, when, as, and if, authorized by the Company’s board of directors (or a duly authorized committee of the Company’s board of directors) and declared by the Company out of funds legally available for the payment of dividends, preferential cumulative cash dividends at the rate of 10.0% per annum of the liquidation preference of $10.00 per share. Dividends are payable quarterly, in arrears, by the last calendar day of March, June, September and December to holders of record at the close of business on the first day of each payment month. The Series A Preferred Stock is not convertible and does not have any voting rights, except when dividends are in arrears for six or more consecutive quarters, then the holders of those shares together with holders of all other series of preferred stock equal in rank would be entitled to vote separately as a class for the election of two additional directors to board of directors, until all dividends accumulated on such shares of Series A Preferred Stock for the past dividend periods and the dividend for the current dividend period shall have been fully paid or declared and a sum sufficient for the payment thereof set apart for payment. The Company may redeem the Series A Preferred Stock upon the occurrence of a change of control, subject to certain conditions. The Company may also voluntarily redeem some or all of the Series A Preferred Stock on or after September 10, 2024. On February 16, 2024, our board of directors declared a cash dividend to holders of our Series A Preferred Stock of $0.25 per share, for an aggregate amount of approximately $0.5 million. The record date for this dividend payment was March 1, 2024 and the payment date was March 11, 2024. As of March 31, 2024, we are current on our preferred dividend payments. On June 2, 2021, the board of directors adopted a tax benefit preservation plan in the form of a Section 382 Rights Agreement (the “382 Agreement”). The 382 Agreement is intended to diminish the risk that our ability to use our net operating loss carryforwards to reduce future federal income tax obligations may become substantially limited due to an “ownership change,” as defined in Section 382 of the Internal Revenue Code of 1986, as amended. The board of directors authorized and declared a dividend distribution of one right for each outstanding share of Common Stock to stockholders of record as of the close of business on June 14, 2021. Each right entitles the registered holder to purchase from the Company one one-thousandth of a share of Series C Participating Preferred Stock, par value $0.0001 per share (the “Series C Preferred Stock”), at an exercise price of $12.00 per one one-thousandth of a share of Series C Preferred Stock, subject to adjustment. The rights will become exercisable following (i) 10 days after a public announcement that a person or group has become an Acquiring Person (as defined in the 382 Agreement); and (ii) 10 business days (or a later date determined by the board of directors) after a person or group begins a tender or an exchange offer that, if completed, would result in that person or group becoming an Acquiring Person. In addition, upon the occurrence of certain events, the exercise price of the rights would be adjusted and holders of the rights (other than rights owned by an acquiring person or group) would be entitled to purchase common stock at approximately half of market value. Given the potential adjustment of the exercise price of the rights, the rights could cause substantial dilution to a person or group that acquires 4.99% or more of common stock on terms not approved by the board of directors. No rights were exercisable at March 31, 2024. There is no impact to financial results as a result of the adoption of the 382 Agreement for the three months ended March 31, 2024.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2024
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events KeyBank Facility On April 24, 2024, KBS entered into a Loan and Security Agreement (the “Keybank Loan Agreement”) with Keybank National Association (“Keybank”) providing KBS with a working capital line of credit of up to $4.0 million, subject to the conditions and procedures set forth in the Keybank Loan Agreement. All borrowings under the Keybank Loan Agreement bear interest at the Adjusted Daily SOFR Rate (as defined in the Keybank Loan Agreement) plus 3%, with interest payable monthly and the outstanding principal balance payable on April 30, 2025 (the “Maturity Date”). The Keybank Loan Agreement also provides for certain fees payable to Keybank during its term. The initial term of the Keybank Loan Agreement expires on the Maturity Date but may be extended from time to time at the request of KBS, subject to approval by Keybank. KBS’ obligations under the Keybank Loan Agreement are guaranteed by the Company and secured by all of KBS’ inventory, equipment, accounts and other intangibles, and all proceeds of the foregoing. Simultaneous with the execution of the Keybank Loan Agreement, the Company entered into that certain Guaranty, dated April 24, 2024 (the “Guaranty”), pursuant to which the Company agreed to guarantee all amounts borrowed by KBS under the Keybank Loan Agreement. Financial covenants require that KBS maintain a ratio of its Operating Cash Flow to its Total Fixed Charges of at least 1.25 to 1.0 measured quarterly for the preceding twelve month period, commencing with the fiscal quarter ending June 30, 2024, and for each subsequent fiscal quarter thereafter. Sale Leaseback Agreements On May 6, 2024, we, through our subsidiary 300 Park Street, LLC, within our investment segment, entered into a contract of purchase and sale (the "300 Park Sale and Leaseback Agreement"), pursuant to which we will consummate a sale and leaseback transaction of 300 Park Street, South Paris, Maine, (the “Maine Premises”) together with any fixtures and other items of real property situated thereon, with MAG Capital Partners Acquisition LLC. The total consideration related to the 300 Park Sale Leaseback Agreement is $6.1 million in cash, which will be paid at the closing. Expected closing date will be in the second quarter of 2024. As of March 31, 2024, the Maine Premises has a carrying value of $1.8 million and is included in Assets held for sale on the unaudited condensed consolidated balance sheet. The carrying value does not exceed the fair value less cost to sell, of which such costs are not currently estimable, however such costs are not expected to exceed $0.5 million. The 300 Park Sale and Leaseback Agreement includes customary representations, warranties, covenants, and indemnification obligations of the parties. On May 6, 2024, we, through our subsidiary 791 Rose Drive, LLC, within our investment segment, entered into a contract of purchase and sale (the "791 Rose Sale and Leaseback Agreement"), pursuant to which we will consummate a sale and leaseback transaction of 791 Rose Drive, Big Lake, Minnesota, (the “Big Lake Premises”) together with any fixtures and other items of real property situated thereon, to HJ Development L.L.P. The total consideration related to the 791 Rose Sale and Leaseback Agreement is $2.8 million in cash, which will be paid at the closing. Expected closing date will be in the second quarter of 2024. As of March 31, 2024, the Big Lake Premises has a carrying value of $2.5 million and is included in Assets held for sale on the unaudited condensed consolidated balance sheet. The carrying value does not exceed the fair value less cost to sell, of which such costs are not currently estimable, however such costs are not expected to exceed $0.2 million. The 791 Rose Sale and Leaseback Agreement includes customary representations, warranties, covenants, and indemnification obligations of the parties. Asset Purchase Agreement On May 17, 2024 (the “Closing Date”), Star Equity Holdings, Inc. (the “Company”) entered into an asset purchase agreement (the “Purchase Agreement”) with Timber Technologies, Inc. (the “Seller”), pursuant to which the Company acquired substantially all of the assets used in the business of the Seller and assumed certain liabilities of the Seller, as set forth in the Purchase Agreement (the “Acquisition”). As consideration for the Acquisition, under the Purchase Agreement, the Seller is entitled to receive consideration of up to $24.1 million, subject to certain post-closing adjustments, including an earn-out provision and a hold back to satisfy certain indemnification obligations under the Purchase Agreement. The earn-out provision of up to $4.1 million is based on Adjusted EBITDA thresholds for two successive measurement periods of twelve months, with the first measurement period ending one year after the Closing Date. If the threshold is met, an earn-out payment may be remitted to the Seller. In connection with the Acquisition, the Seller is also selling all of the Owned Real Property (as defined in the Purchase Agreement) to 106 Bremer, LLC, a wholly-owned subsidiary of the Company, pursuant to a Real Estate Sales Agreement for $3.0 million, which is expected to close within the next 30 to 60 days. The Company’s purchase price allocation is pending the valuation of the assets acquired including goodwill and intangible assets. This valuation is incomplete as of May 20, 2024, as the Company is currently in the process of completing its assessment of valuation inputs and assumptions. Term Loan Agreement In connection with the completion of the Acquisition, on May 17, 2024, Timber Technologies Solutions, Inc., a wholly-owned subsidiary of the Company (the “Borrower”), entered into a Loan Agreement (the “Bridgewater Loan Agreement”) with Bridgewater Bank (“Bridgewater”) and issued a Term Promissory Note to Bridgewater in the amount of $7.0 million thereunder (the “Facility”). All borrowings under the Facility bear interest at 7.85%, with interest payable monthly and the outstanding principal balance payable on May 20, 2029 (the “Maturity Date”). The Bridgewater Loan Agreement also provides for certain fees payable to Bridgewater during its term. The Borrower’s obligations under the Facility are guaranteed by the Company and secured by all of the Borrower’s inventory, equipment, accounts and other intangibles, and all proceeds of the foregoing.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income (loss)	$ (2,224)	$ 435

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Basis of Presentation and Sig_2

Basis of Presentation and Significant Policies (Policies)	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and disclosures made in the accompanying notes to the consolidated financial statements. Significant estimates and judgments include those related to revenue recognition, goodwill valuation, business combination accounting, and income taxes. Actual results could materially differ from those estimates.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments, which potentially subject us to concentrations of credit risk, consist primarily of cash and cash equivalents and accounts receivable. We limit our exposure to credit loss by generally placing cash in high credit quality financial institutions or in major money market mutual funds offered through brokerage firms. Some of our cash balances are maintained at major banking institutions in the United States, a portion of which may, from time to time, exceed the regulatory limit of $250,000 insured by the Federal Deposit Insurance Corporation (FDIC). We have not experienced any credit losses associated with our cash balances. Additionally, we have established guidelines regarding diversification of our investments and their maturities, which are designed to maintain principal and maximize liquidity. As of March 31, 2024, we had $0.2 million of cash in excess of FDIC insured limits.
New Accounting Standards To Be Adopted	New Accounting Standards To Be Adopted No new accounting standards were issued in the quarter ended March 31, 2024 that are expected to have a material impact on our financial statements.
Reclassifications	Reclassifications
Commitments and Contingencies	In the normal course of business, we have been and will likely continue to be subject to litigation or administrative proceedings incidental to our business, such as claims related to compliance with regulatory standards, customer disputes, employment practices, wage and hour disputes, product liability, professional liability, malpractice liability, commercial disputes, licensure restrictions or denials, and warranty or patent infringement. Responding to litigation or administrative proceedings, regardless of whether they have merit, can be expensive and disruptive to normal business operations. We are not able to predict the timing or outcome of these matters but currently do not expect that the resolution of these matters will have a material adverse effect on our financial position or results of operations. The outcome of litigation and the amount or range of potential loss at particular points in time may be difficult to ascertain. Among other things, uncertainties can include how trial and appellate courts will apply the law and interpret facts, as well as the contractual and statutory obligations of other indemnifying and insuring parties. The estimated range of reasonably possible losses, and their effect on our financial position is based on currently available information and is subject to significant judgment and a variety of assumptions, as well as known and unknown uncertainties.

Discontinued Operations (Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2024
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Discontinued Operations Information	The following table presents financial results of our Healthcare division for the three months ended March 31, 2024 and 2023 (in thousands). Three Months Ended March 31, 2024 2023 Total revenues $ — $ 13,359 Total cost of revenues — 10,032 Gross profit — 3,327 Operating expenses: Selling, general and administrative — 2,748 Total operating expenses — 2,748 Income (loss) from discontinued operations — 579 Other (expense) income, net — 8 Interest expense, net — (168) Income (loss) from discontinued operations before income taxes — 419 Income tax benefit (provision) — — Income (loss) from discontinued operations $ — $ 419 The following table presents the significant operating, investing and financing activities from discontinued operations for the three months ended March 31, 2024 and 2023 (in thousands): Three Months Ended March 31, 2024 2023 Operating activities Net income (loss) from discontinued operations $ — $ 419 Depreciation — 272 Non-cash lease expense — 273 Write-off of borrowing costs — 10 Share-based compensation — 1 (Gain) Loss on disposal of assets — 219 Provision for bad debt — 11 Deferred income taxes — (176) Accounts receivable — 396 Inventory — (252) Other assets — 119 Accounts payable — 649 Accrued compensation — 574 Deferred revenue — (135) Operating lease liabilities — (289) Other liabilities — (904) Net cash provided by (used in) operating activities — 1,187 Net cash provided by (used in) investing activities — (107) Net cash provided by (used in) financing activities — (709) Net increase (decrease) in cash and cash equivalents and restricted cash $ — $ 371 Following is the reconciliation of purchase price (including a working capital adjustment) to the total gain recognized in income from discontinued operations from the second quarter of 2023 through March 31, 2024 (in thousands): Proceeds of the disposition, net of transaction costs and indebtedness payoff $ 32,756 Assets of the businesses (24,071) Liabilities of the businesses 18,069 Pre-tax gain on the disposition $ 26,754

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following tables present our continuing revenues disaggregated by major source for the three months ended March 31, 2024 and 2023 (in thousands): Three Months Ended March 31, 2024 Three Months Ended March 31, 2023 Building Solutions Total Building Solutions Total Major Goods/Service Lines Building Solutions Revenue from Contracts with Customers $ 9,118 $ 9,118 $ 12,346 $ 12,346 Total Revenues $ 9,118 $ 9,118 $ 12,346 $ 12,346 Timing of Revenue Recognition Services and goods transferred at a point in time 9,118 9,118 12,346 12,346 Total Revenues $ 9,118 $ 9,118 $ 12,346 $ 12,346
Schedule of Changes in Deferred Revenue	Changes in deferred revenue, which consist primarily of customer deposits, for the three months ended March 31, 2024 are as follows (in thousands): Balance at December 31, 2023 $ 1,377 Revenue recognized that was included in balance at beginning of the year (1,211) Deferred revenue, net, related to contracts entered into during the year 1,530 Balance at March 31, 2024 $ 1,696

Basic and Diluted Net Income _2

Basic and Diluted Net Income (Loss) Per Share (Tables)	3 Months Ended
	Mar. 31, 2024
Earnings Per Share [Abstract]
Schedule of Reconciliation of Shares Used to Compute Basic and Diluted Net Income (Loss) Per Share	The following table sets forth the reconciliation of shares used to compute basic and diluted net income (loss) per share for the periods indicated (in thousands): Three Months Ended March 31, 2024 2023 Numerator: Income (loss) from continuing operations, net of tax $ (2,224) $ 16 Income (loss) from discontinued operations, net of tax (Note 2) — 419 Net income (loss) (2,224) 435 Dividend on Series A perpetual preferred stock (479) (479) Net income (loss) attributable to common shareholders $ (2,703) $ (44) Denominator: Weighted average common shares outstanding 15,842 15,191 Weighted average prefunded warrants outstanding — 325 Weighted average shares outstanding - basic and diluted 15,842 15,516
Schedule of Antidilutive Securities Excluded from Computation of Net Income (Loss) Per Share	The computation of diluted earnings per share excludes stock options, RSUs, and stock warrants that are antidilutive. The following common stock equivalents were antidilutive (in thousands): Three Months Ended March 31, 2024 2023 Stock options — 2 Restricted stock units 85 80 Stock warrants 11,865 11,865 Total 11,950 11,947

Supplementary Balance Sheet I_2

Supplementary Balance Sheet Information (Tables)	3 Months Ended
	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Inventory	The components of inventories are as follows (in thousands): March 31, 2024 December 31, 2023 Raw materials $ 1,456 $ 1,394 Work-in-process 414 410 Finished goods 2,850 1,616 Total inventories 4,720 3,420 Less reserve for excess and obsolete inventories — — Total inventories, net $ 4,720 $ 3,420
Schedule of Property and Equipment	Property and equipment consist of the following (in thousands): March 31, 2024 December 31, 2023 Land $ 548 $ 548 Buildings and leasehold improvements 1,063 1,063 Machinery and equipment 3,709 3,474 Gross property and equipment 5,320 5,085 Accumulated depreciation (1,783) (1,603) Total property and equipment, net $ 3,537 $ 3,482
Schedule of Notes, Receivable	Notes receivable consists of the following principal and interest balances as of March 31, 2024 and December 31, 2023 (in thousands): March 31, 2024 December 31, Principal and interest Principal and interest TTG Note $ 7,634 $ 7,459 MDOS Note 1,117 1,192 KBS Customer Note 176 176 $ 8,927 $ 8,827

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Schedule of Lease Cost and Other Information	The components of lease expense are as follows (in thousands): Three Months Ended March 31, 2024 2023 Operating lease cost $ 116 $ 116 Finance lease cost: Amortization of finance lease assets $ 21 $ 35 Interest on finance lease liabilities 1 5 Total finance lease cost $ 22 $ 40 Supplemental cash flow information related to leases from continuing operations was as follows (in thousands): Three Months Ended March 31, 2024 2023 Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 100 $ 95 Operating cash flows from finance leases $ 1 $ 5 Financing cash flows from finance leases $ 16 $ 44 Right-of-use assets obtained in exchange for lease obligations Operating leases $ — $ —
Schedule of Balance Sheet Information	Supplemental balance sheet information related to leases was as follows: March 31, 2024 December 31, 2023 Weighted average remaining lease term (in years) Operating leases 3.9 4.3 Finance leases 2.2 2.2 Weighted average discount rate Operating leases 5.41 % 5.46 % Finance leases 5.86 % 5.86 %
Schedule of Future Minimum Finance Lease Payments	The future minimum lease payments due under both non-cancelable operating leases and finance leases having initial or remaining lease terms in excess of one year as of March 31, 2024 were as follows (in thousands): Operating Leases Finance Leases 2024 (excludes the three months ended March 31, 2024) $ 352 $ 33 2025 477 25 2026 387 16 2027 92 1 2028 94 — 2029 and thereafter 112 — Total future minimum lease payments 1,514 75 Less amounts representing interest 108 6 Present value of lease obligations $ 1,406 $ 69
Schedule of Future Minimum Operating Lease Payments, Lessee	The future minimum lease payments due under both non-cancelable operating leases and finance leases having initial or remaining lease terms in excess of one year as of March 31, 2024 were as follows (in thousands): Operating Leases Finance Leases 2024 (excludes the three months ended March 31, 2024) $ 352 $ 33 2025 477 25 2026 387 16 2027 92 1 2028 94 — 2029 and thereafter 112 — Total future minimum lease payments 1,514 75 Less amounts representing interest 108 6 Present value of lease obligations $ 1,406 $ 69

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Schedule of Fair Value by Balance Sheet	The following table presents information about our financial assets that are measured at fair value on a recurring basis, and indicates the fair value hierarchy of the valuation techniques we utilize to determine such fair value at March 31, 2024 and December 31, 2023 (in thousands): Fair Value as of March 31, 2024 Level 1 Level 2 Level 3 Total Assets (Liabilities): Equity securities $ 5,575 $ — $ — $ 5,575 Lumber derivative contracts (1) — — (1) Total $ 5,574 $ — $ — $ 5,574 Fair Value as of December 31, 2023 Level 1 Level 2 Level 3 Total Assets (Liabilities): Equity securities $ 4,838 $ — $ — $ 4,838 Lumber derivative contracts 19 — — 19 Total $ 4,857 $ — $ — $ 4,857
Schedule of Derivative Instruments, Gain (Loss)	Gains and losses from lumber derivative contracts are recorded in cost of goods sold of the condensed Consolidated Statements of Operations and included the following for the three months ended March 31, 2024 and 2023, respectively: March 31, 2024 March 31, 2023 Unrealized gain (loss) on lumber derivatives $ (20) $ (43) Realized gain (loss) on lumber derivatives 16 89 Total gain (loss) on lumber derivatives $ (4) $ 46
Schedule of Investment in Equity Securities, Gain (Loss)	Gains and losses from investments in equity securities are recorded in other income (expense) of the condensed Consolidated Statements of Operations and included the following for the three months ended March 31, 2024 and 2023, respectively: March 31, 2024 March 31, 2023 Unrealized gain (loss) on equity securities $ 228 $ 2 Realized gain (loss) on equity securities — — Total gain (loss) on equity securities $ 228 $ 2

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Schedule of Short-term Debt	A summary of debt as of March 31, 2024 and December 31, 2023 is as follows (dollars in thousands): March 31, 2024 December 31, 2023 Amount Weighted-Average Interest Rate Amount Weighted-Average Interest Rate Revolving Credit Facility - Premier $ 1,924 9.25% $ 2,019 9.25% Total Short-term Revolving Credit Facilities $ 1,924 9.25% $ 2,019 9.25% Total Short-term debt $ 1,924 9.25% $ 2,019 9.25%

Segments (Tables)

Segments (Tables)	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Segment information for the three months ended March 31, 2024 and 2023 is as follows (in thousands): Three Months Ended March 31, 2024 2023 Revenue by segment: Building Solutions $ 9,118 $ 12,346 Investments 188 158 Intersegment elimination (188) (158) Consolidated revenue $ 9,118 $ 12,346 Gross profit (loss) by segment: Building Solutions $ 1,678 $ 4,329 Investments 84 95 Intersegment elimination (188) (158) Consolidated gross profit $ 1,574 $ 4,266 Income (loss) from operations by segment: Building Solutions $ (898) $ 1,782 Investments 44 (19) Corporate, eliminations and other (2,108) (1,611) Segment income (loss) from operations $ (2,962) $ 152 Depreciation and amortization by segment: Building Solutions $ 567 $ 505 Investments 104 63 Star Equity corporate 17 4 Total depreciation and amortization $ 688 $ 572

Mergers and Acquisitions (Table

Mergers and Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2024
Business Combination and Asset Acquisition [Abstract]
Schedule of Fair Value of the Net Assets Acquired	The following table sets forth the purchase price allocation of BLL to the estimated fair value of assets acquired as of the acquisition date (in thousands): As of Acquisition date Purchase Price Cash Paid to Sellers $ 2,770 Fair Value of Earn-out Provision 169 Total consideration 2,939 Purchase Price allocation Inventories, net 438 Accounts receivable 578 Property and equipment 2,654 Intangible assets 900 Deferred tax liability (461) Fair value allocated to net assets acquired 4,109 Bargain purchase gain $ (1,170)
Schedule of Pro Forma Information	The following unaudited pro forma combined financial information presents our results as if the BLL acquisition had occurred at the beginning of fiscal 2023 (in thousands): March 31, 2023 (unaudited) Revenue $ 12,901 Gross Profit 4,548 Net income (loss) $ 436

Basis of Presentation and Sig_3

Basis of Presentation and Significant Policies - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of operating segments | segment	2
Cash, FDIC insured amount	$ 250
Cash in excess of FDIC limit	200
Property and equipment, net	$ 3,537	$ 3,482
Held-for-sale | Reclassification Segmentation Basis Change
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property and equipment, net		$ 4,300

Discontinued Operations - Narra

Discontinued Operations - Narrative (Details) - TTG Note - Digirad Health Inc. $ in Millions	May 04, 2023 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of subsidiary stock sold	85%
Percentage of shares contributed	15%
Net proceeds	$ 40
Cash proceeds from sale of equity	19.7
Paydown of debt and transaction costs	27
Notes issued in sale transaction	7
Value of shares issued in transaction	$ 6

Discontinued Operations - Finan

Discontinued Operations - Financial Results (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating expenses:
Income (loss) from discontinued operations	$ 0	$ 419
Healthcare Business | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	0	13,359
Total cost of revenues	0	10,032
Gross profit	0	3,327
Operating expenses:
Selling, general and administrative	0	2,748
Total operating expenses	0	2,748
Income (loss) from discontinued operations	0	579
Other (expense) income, net	0	8
Interest expense, net	0	(168)
Income (loss) from discontinued operations before income taxes	0	419
Income tax benefit (provision)	0	0
Income (loss) from discontinued operations	$ 0	$ 419

Discontinued Operations - Suppl

Discontinued Operations - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations	$ 0	$ 419
Depreciation	246	414
Non-cash lease expense	100	349
Share-based compensation	58	102
Provision for bad debt	(24)	28
Deferred income taxes	2	0
Accounts receivable	1,443	2,729
Inventory	(1,300)	584
Other assets	158	413
Accounts payable	(68)	694
Accrued compensation	(754)	323
Other liabilities	(478)	(511)
Discontinued Operations, Disposed of by Sale | Healthcare Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income (loss) from discontinued operations	0	419
Depreciation	0	272
Non-cash lease expense	0	273
Write-off of borrowing costs	0	10
Share-based compensation	0	1
(Gain) Loss on disposal of assets	0	219
Provision for bad debt	0	11
Deferred income taxes	0	(176)
Accounts receivable	0	396
Inventory	0	(252)
Other assets	0	119
Accounts payable	0	649
Accrued compensation	0	574
Deferred revenue	0	(135)
Operating lease liabilities	0	(289)
Other liabilities	0	(904)
Net cash provided by (used in) operating activities	0	1,187
Net cash provided by (used in) investing activities	0	(107)
Net cash provided by (used in) financing activities	0	(709)
Net increase (decrease) in cash and cash equivalents and restricted cash	$ 0	$ 371

Discontinued Operations - Recon

Discontinued Operations - Reconciliation (Details) - Discontinued Operations, Disposed of by Sale - Healthcare Business $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds of the disposition, net of transaction costs and indebtedness payoff	$ 32,756
Assets of the businesses	(24,071)
Liabilities of the businesses	18,069
Pre-tax gain on the disposition	$ 26,754

Revenue - Schedule of Disaggreg

Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total Revenues	$ 9,118	$ 12,346
Services and goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	9,118	12,346
Building Solutions Revenue from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	9,118	12,346
Building Solutions
Disaggregation of Revenue [Line Items]
Total Revenues	9,118	12,346
Building Solutions | Services and goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	9,118	12,346
Building Solutions | Building Solutions Revenue from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 9,118	$ 12,346

Revenue - Schedule of Changes i

Revenue - Schedule of Changes in Deferred Revenue (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Deferred Revenue
Beginning balance	$ 1,377
Revenue recognized that was included in balance at beginning of the year	(1,211)
Deferred revenue, net, related to contracts entered into during the year	1,530
Ending balance	$ 1,696

Basic and Diluted Net Income _3

Basic and Diluted Net Income (Loss) Per Share - Reconciliation of Shares Used to Compute Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Numerator:
Income (loss) from continuing operations, net of tax		$ (2,224)	$ 16
Income (loss) from discontinued operations, net of tax (Note 2)		0	419
Net income (loss)		(2,224)	435
Dividend on Series A perpetual preferred stock		(479)	(479)
Net income (loss) attributable to common shareholders		(2,703)	(44)
Net income (loss) attributable to common shareholders		$ (2,703)	$ (44)
Denominator:
Weighted average common shares outstanding (in shares)		15,842	15,191
Weighted average prefunded warrants outstanding (in shares)		0	325
Weighted average shares outstanding - basic (in shares)	[1]	15,842	15,516
Weighted average shares outstanding - diluted (in shares)	[1]	15,842	15,516
[1] *Earnings per share may not add due to rounding

Basic and Diluted Net Income _4

Basic and Diluted Net Income (Loss) Per Share - Anti-dilutive Shares (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	11,950	11,947
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	0	2
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	85	80
Stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	11,865	11,865

Supplementary Balance Sheet I_3

Supplementary Balance Sheet Information - Schedule of Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 1,456	$ 1,394
Work-in-process	414	410
Finished goods	2,850	1,616
Total inventories	4,720	3,420
Less reserve for excess and obsolete inventories	0	0
Total inventories, net	$ 4,720	$ 3,420

Supplementary Balance Sheet I_4

Supplementary Balance Sheet Information - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 5,320	$ 5,085
Accumulated depreciation	(1,783)	(1,603)
Total property and equipment, net	3,537	3,482
Land
Property, Plant and Equipment [Line Items]
Gross property and equipment	548	548
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Gross property and equipment	1,063	1,063
Machinery and equipment
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 3,709	$ 3,474

Supplementary Balance Sheet I_5

Supplementary Balance Sheet Information - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended
	May 04, 2026	May 04, 2023	Mar. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross property and equipment			$ 5,320	$ 5,085
Land and Building
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gross property and equipment			$ 1,000
TTG Note | Digirad Health Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notes issued in sale transaction		$ 7,000
Interest rate for notes receivable (as a percent)		5%
Value of shares issued in transaction		$ 6,000
TTG Note | Digirad Health Inc. | SOFR
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Basis spread (percent)		5%
TTG Note | Digirad Health Inc. | Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest rate for notes receivable (as a percent)	5%
TTG Note | Digirad Health Inc. | Forecast | SOFR
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Basis spread (percent)	7%
MDOS Note
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest rate for notes receivable (as a percent)			5%
Original principal amount of notes			$ 1,100
Notes receivable, current			200
Notes receivable, noncurrent			900
Quarterly installment principal receivable			$ 74
KBS Customer Note
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest rate for notes receivable (as a percent)				12%
Building Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Standard warranty period			12 months
EBGL
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Standard warranty period			25 years

Supplementary Balance Sheet I_6

Supplementary Balance Sheet Information - Schedule of Notes Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Supplementary Balance Sheet Information [Line Items]
Principal and interest	$ 8,927	$ 8,827
TTG Note
Supplementary Balance Sheet Information [Line Items]
Principal and interest	7,634	7,459
MDOS Note
Supplementary Balance Sheet Information [Line Items]
Principal and interest	1,117	1,192
KBS Customer Note
Supplementary Balance Sheet Information [Line Items]
Principal and interest	$ 176	$ 176

Leases - Narrative (Details)

Leases - Narrative (Details)	3 Months Ended
	Mar. 31, 2024
Lessee, Lease, Description [Line Items]
Option to terminate period (in years)	1 year
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term (in years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term (in years)	10 years

Leases - Schedule of Lease Expe

Leases - Schedule of Lease Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Leases [Abstract]
Operating lease cost	$ 116	$ 116
Finance lease cost:
Amortization of finance lease assets	21	35
Interest on finance lease liabilities	1	5
Total finance lease cost	$ 22	$ 40

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 100	$ 95
Operating cash flows from finance leases	1	5
Financing cash flows from finance leases	16	44
Right-of-use assets obtained in exchange for lease obligations
Operating leases	$ 0	$ 0

Leases - Schedule of Suppleme_2

Leases - Schedule of Supplemental Balance Sheet Information (Details)	Mar. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease, weighted average remaining lease term (in years)	3 years 10 months 24 days	4 years 3 months 18 days
Financing leases, weighted average remaining lease term (in years)	2 years 2 months 12 days	2 years 2 months 12 days
Operating leases, weighted average discount rate (percent)	5.41%	5.46%
Financing leases, weighted average discount rate (percent)	5.86%	5.86%

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments, Lessee (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Operating Leases
2024 (excludes the three months ended March 31, 2024)	$ 352
2025	477
2026	387
2027	92
2028	94
2029 and thereafter	112
Total future minimum lease payments	1,514
Less amounts representing interest	108
Present value of lease obligations	1,406
Finance Leases
2024 (excludes the three months ended March 31, 2024)	33
2025	25
2026	16
2027	1
2028	0
2029 and thereafter	0
Total future minimum lease payments	75
Less amounts representing interest	6
Present value of lease obligations	$ 69

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Lumber derivative contracts	$ 0	$ 19
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	5,575	4,838
Lumber derivative contracts	(1)
Lumber derivative contracts		19
Total	5,574	4,857
Level 1 | Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	5,575	4,838
Lumber derivative contracts	(1)
Lumber derivative contracts		19
Total	5,574	4,857
Level 2 | Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0	0
Lumber derivative contracts	0
Lumber derivative contracts		0
Total	0	0
Level 3 | Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0	0
Lumber derivative contracts	0
Lumber derivative contracts		0
Total	$ 0	$ 0

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($) boardFeet derivative	Mar. 31, 2023 USD ($)	Dec. 31, 2023 boardFeet derivative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities, unrealized gain	$ 228	$ 2
Loss on derivatives	$ (4)	$ (46)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total cost of revenues	Total cost of revenues
Long
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, nonmonetary notional amount (board feet) | boardFeet	412,500		605,000
Number of derivative instruments held | derivative	15		22

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Derivative Instruments, Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total gain (loss) on lumber derivatives	$ (4)	$ (46)
Commodity Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on lumber derivatives	(20)	(43)
Realized gain (loss) on lumber derivatives	16	89
Total gain (loss) on lumber derivatives	$ (4)	$ 46

Fair Value Measurements - Sch_3

Fair Value Measurements - Schedule of Investment in Equity Securities, Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value Disclosures [Abstract]
Unrealized gain (loss) on equity securities	$ 228	$ 2
Realized gain (loss) on equity securities	0	0
Total gain (loss) on equity securities	$ 228	$ 2

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total Short-term debt	$ 1,924	$ 2,019
Weighted-Average Interest Rate	9.25%	9.25%
Revolving Credit Facility
Debt Instrument [Line Items]
Total Short-term debt	$ 1,924	$ 2,019
Weighted-Average Interest Rate	9.25%	9.25%
Revolving Credit Facility | Revolving Credit Facility - Premier
Debt Instrument [Line Items]
Total Short-term debt	$ 1,924	$ 2,019
Weighted-Average Interest Rate	9.25%	9.25%

Debt - Narratives (Details)

Debt - Narratives (Details)			3 Months Ended		6 Months Ended
	Aug. 16, 2023 USD ($)	Mar. 29, 2019 USD ($)	Mar. 31, 2024 USD ($)	Jun. 30, 2023 USD ($) credit_facility	Jun. 30, 2023 USD ($)	Dec. 05, 2023 USD ($)
eCapital - Star Loan Principal, net
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 2,500,000
Debt balance				$ 0	$ 0
eCapital - Star Loan Principal, net | Prime Rate
Debt Instrument [Line Items]
Basis spread (percent)			3.50%
Revolving Credit Facility | Revolving Credit Facility - Premier
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 6,000,000
Borrowing availability			$ 2,200,000
Revolving Credit Facility | Revolving Credit Facility - Premier | Line of Credit
Debt Instrument [Line Items]
Debt service coverage ratio (less than)	1.25
Debt to equity ratio (in excess of)	1.65
Fixed charge coverage ratio (less than)	1.10
Working capital	$ 2,000,000
Revolving Credit Facility | Revolving Credit Facility - Premier | Line of Credit | Minimum
Debt Instrument [Line Items]
Stated rate (percent)	6.75%
Current ratio	1.50
Revolving Credit Facility | Revolving Credit Facility - Premier | Line of Credit | Prime Rate
Debt Instrument [Line Items]
Basis spread (percent)	0.75%
Revolving Credit Facility | Webster Loan Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 20,000,000
Debt term		5 years
Revolving Credit Facility | Revolving Credit Facility - eCapital EBGL
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 4,000,000	$ 4,000,000
Debt, renewal term					1 year
Number of credit facilities closed | credit_facility				2
Debt balance				$ 0	$ 0
Revolving Credit Facility | Revolving Credit Facility - eCapital EBGL | KBS
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 4,000,000	$ 4,000,000
Debt, renewal term					1 year

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income tax from continuing operations	$ 35	$ 0
Unrecognized tax benefits	300
Unrecognized tax benefits that would impact effective tax rate	$ 300

Segments - Narrative (Details)

Segments - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segments - Schedule of Segment

Segments - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Consolidated revenue	$ 9,118	$ 12,346
Consolidated gross profit	1,574	4,266
Income (loss) from operations by segment	(2,962)	152
Segment income (loss) from operations	(2,962)	152
Total depreciation and amortization	688	572
Building Solutions
Segment Reporting Information [Line Items]
Consolidated revenue	9,118	12,346
Operating Segments | Building Solutions
Segment Reporting Information [Line Items]
Consolidated revenue	9,118	12,346
Consolidated gross profit	1,678	4,329
Income (loss) from operations by segment	(898)	1,782
Total depreciation and amortization	567	505
Operating Segments | Investments
Segment Reporting Information [Line Items]
Consolidated revenue	188	158
Consolidated gross profit	84	95
Income (loss) from operations by segment	44	(19)
Total depreciation and amortization	104	63
Intersegment elimination
Segment Reporting Information [Line Items]
Consolidated revenue	(188)	(158)
Consolidated gross profit	(188)	(158)
Corporate, eliminations and other
Segment Reporting Information [Line Items]
Income (loss) from operations by segment	(2,108)	(1,611)
Star Equity corporate
Segment Reporting Information [Line Items]
Total depreciation and amortization	$ 17	$ 4

Mergers and Acquisitions - Narr

Mergers and Acquisitions - Narrative (Details) - Big Lake Lumber $ in Thousands	Oct. 31, 2023 USD ($)
Business Combination Segment Allocation [Line Items]
Cash consideration	$ 2,770
Earn out provision (up to)	500
Fair value of earn-out provision	169
Fair value allocated to net assets acquired	4,109
Bargain purchase gain on acquisition	1,170
Maximum
Business Combination Segment Allocation [Line Items]
Earn out provision (up to)	$ 300

Mergers and Acquisitions - Sche

Mergers and Acquisitions - Schedule of Fair Value of the Net Assets Acquired (Details) - Big Lake Lumber $ in Thousands	Oct. 31, 2023 USD ($)
Purchase Price
Cash Paid to Sellers	$ 2,770
Fair Value of Earn-out Provision	169
Total consideration	2,939
Purchase Price allocation
Inventories, net	438
Accounts receivable	578
Property and equipment	2,654
Intangible assets	900
Deferred tax liability	(461)
Fair value allocated to net assets acquired	4,109
Bargain purchase gain	$ (1,170)

Mergers and Acquisitions - Sc_2

Mergers and Acquisitions - Schedule of Pro Forma Information (Details) - Big Lake Lumber $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Business Combination Segment Allocation [Line Items]
Revenue	$ 12,901
Gross Profit	4,548
Net income (loss)	$ 436

Related Party Transaction (Deta

Related Party Transaction (Details) - $ / shares	Dec. 10, 2021	Mar. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, outstanding (in shares)		15,848,202	15,826,217
Series A Preferred Stock
Related Party Transaction [Line Items]
Preferred stock, outstanding (in shares)		1,915,637
Executive Chairman | Digirad Corporation
Related Party Transaction [Line Items]
Common stock, outstanding (in shares)		4,062,485
Percentage of outstanding shares		25.63%
Executive Chairman | Digirad Corporation | Series A Preferred Stock
Related Party Transaction [Line Items]
Preferred stock, outstanding (in shares)		1,182,414
Executive Chairman | Private Placement
Related Party Transaction [Line Items]
Number of shares issued in transaction (in shares)	650,000
Price of stock sold (in usd per share)	$ 3.25

Perpetual Preferred Stock - Nar

Perpetual Preferred Stock - Narrative (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Feb. 16, 2024 USD ($) $ / shares	Mar. 31, 2024 qtr director $ / shares
Class of Stock [Line Items]
Preferred stock, dividend rate (in percent)		10%
Liquidation preference (in usd per share)		$ 10
Number of additional directors that can be voted to board of directors | director		2
Series A Cumulative Perpetual Preferred Stock
Class of Stock [Line Items]
Number of consecutive quarters that dividends are in arrears | qtr		6
Dividends to holders of preferred stock (in usd per share)	$ 0.25
Preferred stock dividends paid | $	$ 0.5

Equity Transactions (Details)

Equity Transactions (Details) - $ / shares	3 Months Ended
	Mar. 31, 2024	Sep. 30, 2023
2020 Public Offering
Schedule of Equity Method Investments [Line Items]
Number of warrants exercised (in shares)	1,000,000
Warrants outstanding (in shares)	1,400,000
Class of warrant or right, number of securities called by warrants or rights (in shares)	700,000
Exercise price of warrants (in usd per share)	$ 2.25
2022 Public Offering
Schedule of Equity Method Investments [Line Items]
Warrants outstanding (in shares)	10,900,000
Exercise price of warrants (in usd per share)	$ 1.50
2022 Public Offering | Prefunded Warrant
Schedule of Equity Method Investments [Line Items]
Number of warrants exercised (in shares)		300,000
Warrants outstanding (in shares)	0
Exercise price of warrants (in usd per share)		$ 0.01

Preferred Stock Rights (Details

Preferred Stock Rights (Details)	Mar. 31, 2024 $ / shares shares	Dec. 31, 2023 $ / shares	Jun. 14, 2021 $ / shares shares	Jun. 02, 2021 $ / shares
Class of Stock [Line Items]
Preferred stock, dividend rights declared			1
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Number of days for stock rights to become exercisable (in days)			10 days
Acquisition of common stock, threshold (percent)			4.99%
Dividend rights exercisable (in shares) | shares	0
Series C Participating Preferred Stock, par value $0.0001 per share Purchase Rights
Class of Stock [Line Items]
Right to purchase preferred stock (in shares) | shares			0.001
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001		$ 0.0001
Cash redemption price (in usd per share)			$ 0.012

Subsequent Events (Details)

Subsequent Events (Details)	May 17, 2024 USD ($) measurement_period	May 06, 2024 USD ($)	Apr. 24, 2024 USD ($)	Mar. 31, 2024 USD ($)
Investments | Maine Premises | Held-for-sale
Subsequent Event [Line Items]
Carrying value				$ 1,800,000
Investments | Big Lake Premises
Subsequent Event [Line Items]
Carrying value				$ 2,500,000
Subsequent Event | Bridgewater Bank | Notes Payable
Subsequent Event [Line Items]
Debt instrument, face amount	$ 7,000,000
Stated rate (percent)	7.85%
Subsequent Event | Timber Technologies, Inc.
Subsequent Event [Line Items]
Purchase consideration	$ 24,100,000
Earn out provision (up to)	$ 4,100,000
Earn-out provision, number of measurement periods | measurement_period	2
Earn-out provision, measurement period	12 months
Subsequent Event | Investments | Maine Premises
Subsequent Event [Line Items]
Cash consideration		$ 6,100,000
Sale leaseback transaction, costs		500,000
Subsequent Event | Investments | Big Lake Premises
Subsequent Event [Line Items]
Cash consideration		2,800,000
Sale leaseback transaction, costs		$ 200,000
Subsequent Event | KBS | Keybank Loan Agreement
Subsequent Event [Line Items]
Maximum borrowing capacity			$ 4,000,000
Subsequent Event | KBS | Keybank Loan Agreement | Minimum
Subsequent Event [Line Items]
Operating cash flow to total fixed charges ratio			1.25
Subsequent Event | KBS | Keybank Loan Agreement | SOFR
Subsequent Event [Line Items]
Basis spread (percent)			3%
Subsequent Event | 106 Bremer, LLC | Subsidiaries | Owned Real Property
Subsequent Event [Line Items]
Real estate purchase	$ 3,000,000