Harbor Diversified (HRBR) 10-Q 23 Oct 20 2020 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2020	Sep. 30, 2020
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Registrant Name	HARBOR DIVERSIFIED, INC.
Entity Central Index Key	0000899394
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	No
Entity Filer Category	Non-accelerated Filer
Entity Interactive Data Current	Yes
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity File Number	001-34584
Entity Incorporation State Country Code	DE
Entity Tax Identification Number	13-3697002
Entity Address Address Line1	W6390 Challenger Drive
Entity Address Address Line2	Suite 203
Entity Address City Or Town	Appleton
Entity Address Postal Zip Code	54914-9120
Entity Address State Or Province	WI
City Area Code	920
Local Phone Number	749-4188
Entity Common Stock, Shares Outstanding		54,863,305

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents	$ 78,342	$ 69,454
Restricted cash	820	819
Accounts receivable, net	4,451	5,525
Spare parts and supplies, net	7,703	7,819
Contract costs	400	400
Prepaid expenses and other	1,433	1,003
Total Current Assets	93,149	85,020
Property and Equipment
Flight property and equipment	261,641	242,613
Ground property and equipment	8,314	8,305
Less accumulated depreciation	(106,937)	(99,680)
Net Property and Equipment	163,018	151,238
Other Assets
Operating lease right of use asset	19,761	24,026
Intangibles	5,300	5,300
Long-term investments	4,275	4,275
Long-term contract costs	767	867
Other	1,961	1,906
Total Other Assets	32,064	36,374
Total Assets	288,231	272,632
Current Liabilities
Accounts payable	17,872	16,608
Accrued payroll and employee benefits	15,719	15,474
Current portion of operating lease liability	5,376	6,311
Other accrued expenses	789	327
Contract liabilities	7,100	8,342
Income taxes payable	193	213
Current portion of long-term debt (stated principal amount of $7,198 at March 31, 2020 and December 31, 2019)	13,545	12,845
Total Current Liabilities	60,594	60,120
Other Liabilities
Long-term debt (stated principal amount of $96,988 at March 31, 2020 and December 31, 2019)	107,138	107,838
Long-term promissory note	4,275	4,275
Deferred tax liability	2,592	2,599
Long-term operating lease liability	9,698	10,538
Long-term contract liabilities	7,153	8,086
Other	1,646	1,655
Total Long-Term Liabilities	132,502	134,991
Commitments and Contingencies (Note 8)
Mezzanine Equity Series C Convertible Redeemable Preferred Stock, $0.01 par value, 4,000,000 shares authorized, issued and outstanding at March 31, 2020 and December 31, 2019	13,365
Stockholders' Equity
Common Stock, $0.01 par value, 100,000,000 shares authorized, 55,481,000 shares issued and 54,863,305 shares outstanding at March 31, 2020 and December 31, 2019	555	555
Additional paid-in capital	288,815	288,980
Retained deficit	(207,119)	(211,533)
Treasury stock, at cost, 617,835 shares issued at March 31, 2020 and December 31, 2019	(481)	(481)
Total Stockholders' Equity	81,770	77,521
Total Liabilities and Stockholders' Equity	$ 288,231	$ 272,632

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current portion of long-term debt principal amount	$ 7,198	$ 7,198
Non-current portion of long term debt principal amount	$ 96,988	$ 96,988
Common stock par value	$ 0.01	$ 0.01
Common stock share autorized	100,000,000	100,000,000
Common stock share issued	55,481,140	55,481,140
Common stock share outstanding	54,863,305	54,863,305
Treasury stock, shares	617,835	617,835
Series C Redeemable Convertible Preferred Stock [Member]
Temporary equity par value	$ 0.01
Temporary equity shares authorized	4,000,000	0
Temporary equity shares issued	4,000,000	0
Temporary equity shares outstanding	4,000,000	0

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Revenues
Total Operating Revenues	$ 67,079	$ 61,540
Operating Expenses
Payroll and related costs	31,626	30,637
Aircraft fuel and oil	31	44
Aircraft maintenance, materials and repairs	14,011	14,204
Aircraft rent	3,352	7,921
Other rents	1,509	2,164
Depreciation, amortization and obsolescence	6,941	5,731
Purchased services and other	6,045	5,612
Total Operating Expenses	63,515	66,313
Income (Loss) From Operations	3,564	(4,773)
Other (Expense) Income
Interest income	225	306
Interest expense	(428)	(375)
Other	(19)	1,962
Total Other (Expense) Income	(222)	1,893
Net Income (Loss) Before Taxes	3,342	(2,880)
Income Tax (Benefit) Expense	(1,072)	204
Net Income (Loss)	4,414	(3,084)
Preferred Stock Dividends	165
Net Income (Loss) Available to Common Stockholders	$ 4,249	$ (3,084)
Basic earnings (loss) per share	$ 0.08	$ (0.06)
Diluted earnings (loss) per share	$ 0.06	$ (0.06)
Weighted average common shares:
Basic	54,863	54,863
Diluted	68,989	54,863
Contract Revenue [Member]
Operating Revenues
Total Operating Revenues	$ 67,062	$ 61,499
Contract Service and Other [Member]
Operating Revenues
Total Operating Revenues	$ 17	$ 41

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Mezzanine Equity Series C Convertible Redeemable Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Repurchased Stock [Member]
Beginning Balance at Dec. 31, 2018	$ 96,735		$ 555	$ 288,980	$ (192,319)	$ (481)
Beginning balance, Shares at Dec. 31, 2018			54,863			618
Net income (loss)	(3,084)				(3,084)
Ending Balance at Mar. 31, 2019	93,651		$ 555	288,980	(195,403)	$ (481)
Ending balance, shares at Mar. 31, 2019			54,863			618
Beginning Balance at Dec. 31, 2019	77,521		$ 555	288,980	(211,533)	$ (481)
Beginning balance, Shares at Dec. 31, 2019			54,863			618
Net income (loss)	4,414				4,414
Dividend	(165)	$ 165		(165)
Preferred Stock		$ 13,200
Preferred Stock, Shares		4,000
Ending Balance at Mar. 31, 2020	$ 81,770		$ 555	$ 288,815	$ (207,119)	$ (481)
Ending balance, shares at Mar. 31, 2020			54,863			618
Ending balance at Mar. 31, 2020		$ 13,365
Ending balance, Shares at Mar. 31, 2020		4,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows From Operating Activities
Net income (loss)	$ 4,414	$ (3,084)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and obsolescence allowance	6,941	5,731
Aircraft lease termination cost	(84)
Amortization of contract costs	(933)	(927)
Amortization of engine overhauls	732	1,013
Deferred income taxes	(7)	205
Loss on disposition of property	544	(7)
Changes in operating assets and liabilities:
Accounts receivable	1,082	1,057
Spare parts and supplies	(199)	(296)
Prepaid expenses and other	(920)	603
Operating lease right of use asset	2,490	4,636
Accounts payable	(1,691)	1,673
Accrued payroll and employee benefits	245	1,272
Other accrued expenses	462	267
Contract liabilities	(1,242)	(3,192)
Income taxes payable	(20)	14
Other long-term liabilities	(9)
Net Cash Provided by Operating Activities	11,805	8,965
Cash Flows From Investing Activities
Restricted cash	(1)	(2)
Additions to property and equipment	(2,918)	(11,937)
Proceeds on disposition of property and equipment	2	7
Net Cash Used in Investing Activities	(2,917)	(11,932)
Cash Flows From Financing Activities
Net Cash Provided by Financing Activities	0	0
Increase (Decrease) in Cash and Cash Equivalents	8,888	(2,967)
Cash and Cash Equivalents, beginning of period	69,454	60,257
Cash and Cash Equivalents, end of period	$ 78,342	$ 57,290

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP) and include the accounts of Harbor Diversified, Inc. and its consolidated subsidiaries (collectively, the Company). The Company’s consolidated subsidiaries consist of its wholly owned subsidiaries, Lotus Aviation Leasing, LLC, Air Wisconsin Funding LLC, AWAC Aviation, Inc. (AWAC, together with its wholly owned subsidiary, Air Wisconsin Airlines LLC (Air Wisconsin)) and Harbor Therapeutics, Inc. (which is a non-operating entity The consolidated financial statements have been prepared, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and disclosures normally included in the notes to financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations, although the Company believes that the following disclosures are adequate to make the information presented not misleading. These consolidated financial statements reflect all adjustments that, in the opinion of management, are necessary to present fairly the financial condition and results of operations for the interim periods presented. All adjustments are of a normal recurring nature, unless otherwise disclosed. All of the dollar and share amounts set forth in these condensed notes to consolidated financial statements are presented in thousands except per share amounts. These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K (COVID-19) Description of Operations The Company has principal lines of business focused on (1) providing air transportation (airline business), (2) acquiring flight equipment for the purpose of leasing the equipment to Air Wisconsin and (3) providing flight equipment financing to Air Wisconsin. The airline business is operated entirely through Air Wisconsin, which is an independent regional air carrier that is engaged in the business of providing scheduled passenger service under a capacity purchase agreement with United Airlines, Inc. (United) that was entered into in February 2017 and amended in October 2020. See Note 3 for additional information. Air Wisconsin operates as a United Express carrier with a significant presence at both Chicago O’Hare and Washington-Dulles, two of United’s key domestic hubs. Contract and Other Revenues The Company recognizes revenue under its capacity purchase agreement with United (United capacity purchase agreement) over time as services are provided. United pays the Company a fixed rate for each departure and block hour (measured from takeoff to landing, including taxi time), and a fixed amount per aircraft per day, with additional incentives primarily based on flight completion, The United capacity purchase agreement includes weekly provisional cash payments based on a projected level of flying each month. The Company and United subsequently reconcile these payments to the actual completed flight activity on a monthly basis. Under the agreement, the Company is eligible to receive incentive compensation upon the achievement of certain performance criteria. The incentives are defined in the United capacity purchase agreement and are determined and measured on a monthly basis. At the end of each month during the term of the agreement, the Company calculates the incentives achieved during that period and recognizes revenue attributable to the agreement accordingly, subject to the variable constraint guidance under Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) No. 2014—09, Revenue from Contracts with Customers Other revenues are immaterial and primarily consist of the sales of parts to other airlines. The transaction price for the sale of these parts generally occurs at fair market value. Impairment of Long-Lived Assets The Company evaluates long-lived assets for potential impairment and records impairment losses on long-lived assets when events and circumstances indicate the assets might be impaired and the undiscounted cash flows estimated to be generated by those assets are less than their carrying amounts. Impairment losses are measured by comparing the fair value of the assets to their carrying amounts. In determining the need to record impairment charges, the Company is required to make certain estimates and assumptions regarding such things as the current fair market value of the assets and future net cash flows to be generated by the assets. If there are subsequent changes to these estimates or assumptions, or if actual results differ from these estimates or assumptions, such changes could have a material impact on the Company’s financial statements in the future. Certain factors occurring in the three month period ended March 31, 2020, which primarily related to the impacts and disruptions caused by the COVID-19 COVID-19 Impairment of Intangible Assets Indefinite-lived intangible assets, including trade names and Air Wisconsin’s air carrier certificate, are not subject to amortization, but are subject to at least an annual assessment for impairment by applying a fair value-base. The Company’s assessment as of December 31, 2019 determined there was no impairment to the indefinite–lived intangible assets. Certain factors occurring in the three month period ended March 31, 2020, which primarily related to the impacts and disruptions caused by the COVID-19 COVID-19 Comprehensive Income The Company does not have any components of comprehensive income; therefore, as of March 31, 2020 and 2019, respectively, comprehensive income was equal to net income reported in the statements of operations. Concentration of Credit Risk The Company at times has had cash in excess of the Federal Deposit Insurance Corporation (FDIC) insurance limit. As of March 31, 2020, there were no bank deposits that exceeded the FDIC insurance limits. Substantially all the Company’s revenues for the three month periods ended March 31, 2020 and 2019 were derived from the United capacity purchase agreement. See Note 3 for additional information. Estimates and Assumptions The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities, at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates or assumptions for a number of reasons, including the risks and uncertainties described in this Quarterly Report. See the section entitled “ Risk Factors Fair Value of Financial Instruments The Company’s financial instruments include cash and cash equivalents, restricted cash, accounts receivable, long-term investments, accounts payable, and long-term debt. The Company believes the carrying amounts of these financial instruments are a reasonable estimate of their fair value because of the short-term nature of such instruments, or in the case of long-term debt, because of interest rates available to the Company for similar obligations. Long-term investments are held-to-maturity Fair value is defined as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants at the measurement date (that is, an exit price). Fair Value Measurement Level 1 - Quoted market prices in active markets for identical assets or liabilities. Level 2 - Inputs other than Level 1 inputs that are either directly or indirectly observable. Level 3 - Unobservable inputs developed using the Company’s estimates and assumptions, which reflect those that market participants would use. The determination of where an asset or liability falls in the hierarchy requires significant judgment. The Company evaluates its hierarchy disclosures annually and it is possible that an asset or liability may be classified differently from year to year. However, the Company expects that changes in classifications between levels will be rare. The Company classifies money market funds and deposits as Level 1 and long-term investments as Level 2. There have been no transfers between Level 1 and Level 2 investments during the three month period ended March 31, 2020. Recent Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses Measurement of Credit Losses on Financial Instruments 2016-13). 2016-13 2016-13 2016-13

Liquidity

Liquidity	3 Months Ended
	Mar. 31, 2020
Text Block [Abstract]
Liquidity and Management's Plan, COVID-19	2. Liquidity The Company’s ability to meet its liquidity needs is dependent upon generating cash flows from operations in the future in amounts sufficient to meet its obligations and repay its liabilities arising from normal business operations when they come due. There can be no assurance that the Company’s operations will be sufficiently profitable, or that additional funds will be available, to meet its future liquidity needs. Impact of the COVID-19 In January 2020, the World Health Organization (WHO) announced a global health emergency because of a new strain of a novel coronavirus (COVID-19). the COVID-19 outbreak In response to the significant reduction in demand for airline travel due to the COVID-19 pandemic, The COVID-19 pandemic adopt “shelter-in-place” and “stay-at-home” orders, the COVID-19 pandemic. to pre-COVID-19 levels, The COVID-19 pandemic Since a portion of the Company’s revenue is fixed due to the structure of the United capacity purchase agreement, the impact of the COVID-19 the COVID-19 pandemic, Cost Reduction Initiatives In response to these developments, the Company has implemented cost reduction initiatives seeking to mitigate the impact of the COVID-19 pandemic (1) Reducing or deferring employee-related costs, including: (i) Offering voluntary short-term unpaid leaves to employees and furloughing certain employees, (ii) Suspending all non-scale (iii) Instituting a Company-wide hiring freeze, (iv) Offering reduced-guarantee lines of flying, and (v) Deferring the employer’s portion of employees’ social security tax payments. (2) Reducing other non-employee costs (i) Delaying planned non-essential (ii) Delaying maintenance events associated with engines and rotable parts primarily as a result of reduced flight schedules, (iii) Seeking concessions from third-party suppliers, and (iv) Reducing or suspending certain discretionary spending. Deferral of Interest Payments The Company’s primary lender agreed to defer approximately $5,000 of interest payments otherwise due to be paid during the period from March 31, 2020 through September 29, 2020, with all deferred amounts due in a lump sum payment on September 30, 2020, pursuant to the terms of a letter agreement dated March 30, 2020. All deferred amounts were paid on September 30, 2020. See Note 6 for additional information. CARES Act On March 27, 2020, President Trump signed into law the Coronavirus Aid, Relief, and Economic Security (CARES) Act. In addition to the cost reduction measures discussed above, on April 6, 2020, Air Wisconsin applied to a lender for a $10,000 loan (SBA Loan) under the small business Paycheck Protection Program (PPP) established under the CARES Act and administered by the Small Business Administration (SBA). The entire loan amount was received by Air Wisconsin on April 13, 2020. The application for these funds required Air Wisconsin to certify in good faith that current economic uncertainty made the loan request necessary to support the ongoing operations of Air Wisconsin. Air Wisconsin was also required to certify that the loan funds would be used to retain workers and maintain payroll, or to make mortgage payments, lease payments, and utility payments. The SBA Loan has a two-year term for non-payroll costs. In addition, on April 20, 2020, Air Wisconsin entered into a Payroll Support Program Agreement (PSP Agreement) with respect to payroll support (Treasury Payroll Support) from the U.S. Department of Treasury (Treasury) under the payroll support program (Payroll Support Program) provided by the CARES Act. Pursuant to the Payroll Support Program, Air Wisconsin has received approximately $42,200 in the aggregate through October 1, 2020. The PSP Agreement contains various covenants, including that the proceeds from the Payroll Support Program must be used exclusively for the payment of wages, salaries and benefits, that Air Wisconsin cannot involuntarily terminate or furlough any employee prior to October 1, 2020, and that Air Wisconsin cannot reduce any employee’s pay rates or benefits prior to October 1, 2020, without that employee’s consent. The PSP Agreement also gives the Treasury the right to conduct audits, examinations, and evaluations of Air Wisconsin’s compliance with the terms of the agreement. Through notices given pursuant to the federal Worker Adjustment and Retraining Notification (WARN) Act, Air Wisconsin informed approximately 871 employees that they might be furloughed on October 1, 2020, due to the COVID-19 In light of the measures discussed above that the Company has implemented to mitigate the impact of the COVID-19 pandemic

Capacity Purchase Agreement wit

Capacity Purchase Agreement with United	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Capacity Purchase Agreement with United	3. Capacity Purchase Agreement with United In February 2017, the Company entered into the United capacity purchase agreement to operate up to 65 CRJ-200 regional

Property and Equipment

Property and Equipment	3 Months Ended
	Mar. 31, 2020
Property, Plant and Equipment [Abstract]
Property and Equipment	4. Property and Equipment The following presents the Company’s aircraft as of March 31, 2020 and 2019: March 31, 2020 Owned Leased CRJ-200 54 10 March 31, 2019 Owned Leased CRJ-200 37 27 In an asset

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	5. Income Taxes The Company’s effective tax rate for the three month period ended March 31, 2020 was (32.1)%. The Company’s effective tax rate for the period varied from the federal statutory rate of 21.0% primarily due to the provision for state income taxes, the reversal of valuation allowances on federal and state deferred tax assets, and the impact of non-deductible The Company’s effective tax rate for the three month period ended March 31, 2019 was (7.1)%. The Company’s effective tax rate for the period varied from the federal statutory rate of 21.0% primarily due to the provision for state income taxes, the impact of non-deductible

Debt

Debt	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Debt	6. Debt Long-Term Debt Long-term debt consists of the following (with interest rates as of March 31, 2020 and December 31, 2019): March 31, 2020 December 31, 2019 Notes due December 31, 2025 (4.0%) $ 86,497 $ 86,497 Credit Agreements due through 2022 (5.0%) 34,186 34,186 Total Debt 120,683 120,683 Less: Current Maturities 13,545 12,845 Long-Term Debt $ 107,138 $ 107,838 In the period from December 31, 2019 to March 31, 2020, the Company did not incur any additional long-term debt. The debt agreements include, among other provisions, certain non-financial covenants. For a more detailed discussion of the Company’s long-term debt, see Note 6 to the Company’s consolidated financial statements contained within the 2019 Annual Report. Deferral Agreement On March 30, 2020, Air Wisconsin entered into a Letter Agreement with its primary lender to defer until September 30, 2020 all principal and interest payments on the Aircraft Notes and the Other Loans (as defined in the 2019 Annual Report) that would otherwise have been due from March 31, 2020 through September 29, 2020. Under this agreement, Air Wisconsin deferred a payment of $3,945 previously due in March 2020 and deferred a payment of $1,127 previously due in June 2020. All deferred amounts were paid on September 30, 2020. See Note 6 to the Company’s consolidated financial statements contained within the 2019 Annual Report. Maturities of long-term debt for the periods subsequent to March 31, 2020, are as follows: Fiscal Year Amount April 2020 through December 2020 $ 12,845 2021 22,758 2022 23,410 2023 9,170 2024 8,890 Thereafter 43,610 Total $ 120,683 Long-Term Promissory Note In July 2003, Air Wisconsin financed a hangar through the issuance of $4,275 City of Milwaukee, Wisconsin variable rate Industrial Development Bonds. The bonds mature on November 1, 2033. Prior to May 1, 2006, the bonds were secured by a guaranteed investment contract, which was collateralized with cash, and interest was payable semiannually on each of May 1 and November 1. On May 1, 2006, Air Wisconsin acquired the bonds using the cash collateral. The bonds are reported as long-term investments on the balance sheets. The hangar is accounted for as a right-of-use

Lease Obligations

Lease Obligations	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Lease Obligations	7. Lease Obligations As of March 31, 2020, the Company’s right-of-use assets 1,837 The table below presents operating lease related terms and discount rates as of March 31, 2020: Weighted-average remaining lease term 4.1 years Weighted-average discount rate 6.59 % Components of lease costs were as follows for the three month periods ended March 31, 2020 and 2019: March 31, 2020 March 31, 2019 Operating lease cost $ 4,316 $ 8,667 Short-term lease cost 516 1,389 Variable lease cost 29 29 Total Lease Cost $ 4,861 $ 10,085 As of March 31, 2020, the Company leased or subleased certain aircraft and engines, training simulators, and facilities. The following table summarizes the future minimum rental payments required under operating leases that had initial or remaining non-cancelable lease Fiscal Year Amount April 2020 through December 2020 $ 4,013 2021 3,977 2022 3,912 2023 2,765 2024 1,105 Thereafter 987 Total lease payments 16,759 Less imputed interest (1,685 ) Total Lease Liabilities $ 15,074

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	8. Commitments and Contingencies Legal Matters The Company is subject to certain legal actions, which it considers routine to its business activities. As of March 31, 2020, management believes, after consultation with legal counsel, that the ultimate outcome of such legal matters, whether individually or in the aggregate, is not expected to have a material adverse effect on the Company’s financial position, liquidity, or results of operations. Standby Letters of Credit As of March 31, 2020, the Company had ten outstanding letters of credit in the aggregate amount of $814 to guarantee the performance of Company obligations under certain lease agreements and insurance policies. The Company’s restricted cash balance secures the letters of credit. Cash Obligations The following table sets forth our cash obligations for the periods presented (in thousands): Cash Obligations Total Apr – Dec 2020 2021 2022 2023 2024 Thereafter Aircraft Notes principal $ 70,000 $ — $ 7,000 $ 7,000 $ 7,000 $ 7,000 $ 42,000 Aircraft Notes interest $ 16,497 $ 5,647 $ 2,729 $ 2,451 $ 2,170 $ 1,890 $ 1,610 Other Loans principal $ 34,186 $ 7,198 $ 13,029 $ 13,959 $ — $ — $ — Other Loans interest $ 3,193 $ 1,664 $ 1,230 $ 299 $ — $ — $ — Operating lease obligations $ 16,759 $ 4,013 $ 3,977 $ 3,912 $ 2,765 $ 1,105 $ 987 Total $ 140,635 $ 18,522 $ 27,965 $ 27,621 $ 11,935 $ 9,995 $ 44,597 As of March 31, 2020, all of the Company’s long-term debt was subject to fixed interest rates. See Note 8 to the Company’s consolidated financial statements contained within the 2019 Annual Report.

Related-Party Transactions

Related-Party Transactions	3 Months Ended
	Mar. 31, 2020
Related Party Transactions [Abstract]
Related-Party Transactions	9. Related-Party Transactions For the three month periods ended March 31, 2020 and 2019, the Company paid $210 and $824, respectively, pursuant to certain aircraft and engines leases with related parties and for other professional services. Southshore Leasing, through the Southshore Affiliates, leased aircraft and engines to Air Wisconsin pursuant to various operating lease agreements from April 2010 through January 2020. For the three month period ended March 31, 2020, Air Wisconsin paid a total of approximately $150 to Southshore, consisting of approximately $66 for the lease of three aircraft, and approximately $84 for the lease of additional engines to support Air Wisconsin’s operations. For the three month period ended March 31, 2019, Air Wisconsin paid a total of approximately $764 to Southshore, consisting of approximately $270 for the lease of two aircraft, and approximately $494 for the lease of additional engines. Each of these aircraft and engines was acquired by the Company in the transaction described below. In From time to time, Air Wisconsin has also contracted for services to be performed on certain assets held by Southshore that were used in Air Wisconsin’s operations, pursuant to which Air Wisconsin received reimbursement from Southshore at the cost of such services. Because Air Wisconsin acted as an agent or an intermediary in facilitating such transactions, the amounts of any such transactions are not included in the amounts described above. Resource Holdings Associates (Resource Holdings) has provided AWAC and Air Wisconsin with financial advisory and management services pursuant to an agreement entered into in January 2012. AWAC has paid a recurring monthly fee of $20 in exchange for these financial advisory and management services since January 2012. AWAC paid a total of $60 to Resource Holdings for each of the three month periods ended March 31, 2020 and 2019. See the section entitled “ Certain Relationships and Related Transactions, and Director Independence

Earnings Per Share and Equity

Earnings Per Share and Equity	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Earnings Per Share and Equity	10. Earnings Per Share Calculations of net income per share of common stock, for the three month periods ended March 31, 2020 and 2019, were as follows (in thousands, except per share data): Three Months Ended March 31, 2020 2019 Net income (loss) $ 4,414 $ (3,084 ) Preferred stock dividends 165 — Net income (loss) applicable to common stockholders 4,249 (3,084 ) Basic weighted average common shares outstanding 54,863 54,863 Add: Incremental shares for: Dilutive effect of the 2015 Stock Option 559 — Dilutive effect of the Series C Preferred 13,567 N/A Diluted weighted average common shares outstanding 68,989 54,863 Net income (loss) per common share Basic $ 0.08 $ (0.06 ) Diluted $ 0.06 $ (0.06 ) Basic income (loss) per share of common stock is computed by dividing net income (loss) attributable to the Company by the weighted average number of shares of common stock outstanding during the period. The number of incremental shares from the assumed issuance of shares related to the 2015 Stock Option and the Series C Preferred are calculated by applying the treasury stock method. In loss periods, these incremental shares are excluded from the calculation of diluted loss per share, as the inclusion of these items would have an anti-dilutive effect. See Note 11 for additional information. Series C Preferred In .0 (Preferential Dividends). From and after December 31, 2023, upon the election of holders of a majority of the outstanding Series C Preferred, the rate of the Preferential Dividends shall be increased by an additional 1.0% per annum per share for each and every six-month period following such election (Dividend Ratchet ). Board Directors ). Each share of Series C Preferred is convertible, at any time after issuance, into that number of shares of common stock, determined by dividing the then applicable Series C Liquidation Amount (defined below) by $0.80, subject to certain adjustments set forth in the Certificate of Designations (Conversion Price ); ) ), ), ). In the event of any liquidation, dissolution or winding up of the Company or a sale of the Company, the Series C Preferred shall be entitled to receive, prior and in preference to any distribution of any assets of the Company to the common stock or other junior capital stock, an amount equal to the Series C Issue Price, plus an amount equal to all accrued but unpaid Preferential Dividends, Conversion Cap Excess Dividends and any other accrued but unpaid dividends (Series C Liquidation Amount ). At any time following the earliest of (a) the date that is four years after the earlier of the Reporting Date or (i) any merger or consolidation to which the Company is a constituent party and to which one or more third-party entities, unaffiliated with the Company, are constituent parties or (ii) any transaction or series of related transactions pursuant to which the Company shall issue or sell a number of shares of common stock greater than 5 .0 ). In . On each of April 15, 2020, June 30, 2020 and September 29, 2020, the Board of Directors declared dividends of $165, $198 and $198, respectively, on the Series C Preferred, which were paid on April 20, 2020, July 1, 2020, and September 30, 2020, respectively. Based on the applicable accounting guidance, the Company is required to apply the “if-converted” “if-converted” The number of shares of common stock into which the Series C Preferred is convertible, as determined for purposes of calculating the net income (loss) per share of common stock, may not be consistent with the actual number of shares into which the Series C Preferred is convertible pursuant to the Certificate of Designations, Preferences, and Rights of the Series C Preferred (Certificate of Designations) on any particular date. As of March 31, 2020, pursuant to the Certificate of Designations, the Series C Preferred was convertible into an aggregate of 16,500 shares of common stock. The Company accounts for its Series C Preferred in accordance with the guidance in ASC Topic 480, Distinguishing Liabilities from Equity

Stock Options

Stock Options	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
Stock Options	11. Stock Options 2015 Stock Option In 2015, the Company issued a stock option (2015 Stock Option) to purchase 559 shares of common stock at an exercise price of approximately $0.21 per share. The value of the 2015 Stock Option at the date of grant was $0.07 per share based on a life of 7.0 years, a risk-free interest rate of 2.01% and expected volatility of 157.1%. The 2015 Stock Option was the only stock option outstanding as of March 31, 2020 and 2019. After July 9, 2019, the 2015 Stock Option became fully exercisable. Prior to that date it could only be exercised based on the occurrence of certain events. The 2015 Stock Option terminates on earlier to occur of July 9, 2022, or the occurrence of certain corporate transactions.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	3 Months Ended
	Mar. 31, 2020
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	12. Supplemental Cash Flow Information Cash payments for interest for the three month periods ended March 31, 2020 and 2019 were $0 and $5, respectively. Cash payments for income taxes for the three month periods ended March 31, 2020 and 2019 were $0 and $29, respectively. Cash payments included in the measurement of lease liabilities related to operating leases were $ 1,837 for the three month period ended March 31, 2020, and $4,167 for the three month period ended March 31, 2019. In January 2020, the Company acquired aircraft and engines from Southshore Leasing, in a non-cash

Intangible Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	13. Intangible Assets Intangible assets at March 31, 2020 and December 31, 2019 consist of the following (in thousands): March 31, 2020 December 31, 2019 Gross Carrying Amount Gross Carrying Amount Trade names and air carrier certificate 5,300 5,300 Total $ 5,300 $ 5,300

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	14. Subsequent Events The Company evaluated its financial statements for subsequent events through the date the financial statements were available to be issued. The following subsequent events are noted: • See Note 2 for certain subsequent events regarding the impact of the COVID-19 pandemic • On May 22, 2020, the Company acquired eight CRJ-200 aircraft • See Note 6 regarding the deferral of certain interest payments that would have been due in June 2020, but which were paid on September 30, 2020. • Through notices given pursuant to the federal WARN Act, Air Wisconsin informed approximately 871 employees that they might be furloughed on October 1, 2020, due to the COVID-19 • On September 11, 2020, the Company acquired two CRJ-200 • In October 2020, Air Wisconsin entered into an amendment to the United capacity purchase agreement that, among other things: • settled certain disputes that had existed between United and Air Wisconsin over amounts owed to Air Wisconsin under the United capacity purchase agreement; • provided a process for determining the circumstances under which, and the amount for which, United would pay or reimburse Air Wisconsin for costs incurred in connection with the opening and closing of maintenance and crew bases in response to alterations to Air Wisconsin’s operating schedule made at United’s direction; • provided for the payment or accrual of certain amounts by United to Air Wisconsin based on certain scheduling benchmarks; • modified the minimum and maximum daily block hour scheduling parameters; • terminated the limited guarantee by the Company and AWAC of the monetary obligations of Air Wisconsin under the United capacity purchase agreement; • terminated certain provisions in the United capacity purchase agreement that were previously waived by United in March 2020, which constrained Air Wisconsin from flying for another air carrier; and • amended United’s option to extend the term of the United capacity purchase agreement such that United now has an option to extend the term for a period of no less than two years (and up to three years, in its discretion), and a second option to extend for an additional two-year period, subject to mutual agreement by the Company and United as to compensation.

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP) and include the accounts of Harbor Diversified, Inc. and its consolidated subsidiaries (collectively, the Company). The Company’s consolidated subsidiaries consist of its wholly owned subsidiaries, Lotus Aviation Leasing, LLC, Air Wisconsin Funding LLC, AWAC Aviation, Inc. (AWAC, together with its wholly owned subsidiary, Air Wisconsin Airlines LLC (Air Wisconsin)) and Harbor Therapeutics, Inc. (which is a non-operating entity The consolidated financial statements have been prepared, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Certain information and disclosures normally included in the notes to financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations, although the Company believes that the following disclosures are adequate to make the information presented not misleading. These consolidated financial statements reflect all adjustments that, in the opinion of management, are necessary to present fairly the financial condition and results of operations for the interim periods presented. All adjustments are of a normal recurring nature, unless otherwise disclosed. All of the dollar and share amounts set forth in these condensed notes to consolidated financial statements are presented in thousands except per share amounts. These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K (COVID-19)
Description of Operations	Description of Operations The Company has principal lines of business focused on (1) providing air transportation (airline business), (2) acquiring flight equipment for the purpose of leasing the equipment to Air Wisconsin and (3) providing flight equipment financing to Air Wisconsin. The airline business is operated entirely through Air Wisconsin, which is an independent regional air carrier that is engaged in the business of providing scheduled passenger service under a capacity purchase agreement with United Airlines, Inc. (United) that was entered into in February 2017 and amended in October 2020. See Note 3 for additional information. Air Wisconsin operates as a United Express carrier with a significant presence at both Chicago O’Hare and Washington-Dulles, two of United’s key domestic hubs.
Contract and Other Revenues	Contract and Other Revenues The Company recognizes revenue under its capacity purchase agreement with United (United capacity purchase agreement) over time as services are provided. United pays the Company a fixed rate for each departure and block hour (measured from takeoff to landing, including taxi time), and a fixed amount per aircraft per day, with additional incentives primarily based on flight completion, The United capacity purchase agreement includes weekly provisional cash payments based on a projected level of flying each month. The Company and United subsequently reconcile these payments to the actual completed flight activity on a monthly basis. Under the agreement, the Company is eligible to receive incentive compensation upon the achievement of certain performance criteria. The incentives are defined in the United capacity purchase agreement and are determined and measured on a monthly basis. At the end of each month during the term of the agreement, the Company calculates the incentives achieved during that period and recognizes revenue attributable to the agreement accordingly, subject to the variable constraint guidance under Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) No. 2014—09, Revenue from Contracts with Customers Other revenues are immaterial and primarily consist of the sales of parts to other airlines. The transaction price for the sale of these parts generally occurs at fair market value.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company evaluates long-lived assets for potential impairment and records impairment losses on long-lived assets when events and circumstances indicate the assets might be impaired and the undiscounted cash flows estimated to be generated by those assets are less than their carrying amounts. Impairment losses are measured by comparing the fair value of the assets to their carrying amounts. In determining the need to record impairment charges, the Company is required to make certain estimates and assumptions regarding such things as the current fair market value of the assets and future net cash flows to be generated by the assets. If there are subsequent changes to these estimates or assumptions, or if actual results differ from these estimates or assumptions, such changes could have a material impact on the Company’s financial statements in the future. Certain factors occurring in the three month period ended March 31, 2020, which primarily related to the impacts and disruptions caused by the COVID-19 COVID-19
Impairment of Intangible Assets	Impairment of Intangible Assets Indefinite-lived intangible assets, including trade names and Air Wisconsin’s air carrier certificate, are not subject to amortization, but are subject to at least an annual assessment for impairment by applying a fair value-base. The Company’s assessment as of December 31, 2019 determined there was no impairment to the indefinite–lived intangible assets. Certain factors occurring in the three month period ended March 31, 2020, which primarily related to the impacts and disruptions caused by the COVID-19 COVID-19
Comprehensive Income	Comprehensive Income The Company does not have any components of comprehensive income; therefore, as of March 31, 2020 and 2019, respectively, comprehensive income was equal to net income reported in the statements of operations.
Concentration of Credit Risk	Concentration of Credit Risk The Company at times has had cash in excess of the Federal Deposit Insurance Corporation (FDIC) insurance limit. As of March 31, 2020, there were no bank deposits that exceeded the FDIC insurance limits. Substantially all the Company’s revenues for the three month periods ended March 31, 2020 and 2019 were derived from the United capacity purchase agreement. See Note 3 for additional information.
Estimates and Assumptions	Estimates and Assumptions The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities, at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ materially from those estimates or assumptions for a number of reasons, including the risks and uncertainties described in this Quarterly Report. See the section entitled “ Risk Factors
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company’s financial instruments include cash and cash equivalents, restricted cash, accounts receivable, long-term investments, accounts payable, and long-term debt. The Company believes the carrying amounts of these financial instruments are a reasonable estimate of their fair value because of the short-term nature of such instruments, or in the case of long-term debt, because of interest rates available to the Company for similar obligations. Long-term investments are held-to-maturity Fair value is defined as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants at the measurement date (that is, an exit price). Fair Value Measurement Level 1 - Quoted market prices in active markets for identical assets or liabilities. Level 2 - Inputs other than Level 1 inputs that are either directly or indirectly observable. Level 3 - Unobservable inputs developed using the Company’s estimates and assumptions, which reflect those that market participants would use. The determination of where an asset or liability falls in the hierarchy requires significant judgment. The Company evaluates its hierarchy disclosures annually and it is possible that an asset or liability may be classified differently from year to year. However, the Company expects that changes in classifications between levels will be rare. The Company classifies money market funds and deposits as Level 1 and long-term investments as Level 2. There have been no transfers between Level 1 and Level 2 investments during the three month period ended March 31, 2020.
Recently Adopted Standards	Recent Accounting Pronouncements In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses Measurement of Credit Losses on Financial Instruments 2016-13). 2016-13 2016-13 2016-13

Property and Equipment (Tables)

Property and Equipment (Tables)	3 Months Ended
	Mar. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of Company's Aircrafts	The following presents the Company’s aircraft as of March 31, 2020 and 2019: March 31, 2020 Owned Leased CRJ-200 54 10 March 31, 2019 Owned Leased CRJ-200 37 27

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt consists of the following (with interest rates as of March 31, 2020 and December 31, 2019): March 31, 2020 December 31, 2019 Notes due December 31, 2025 (4.0%) $ 86,497 $ 86,497 Credit Agreements due through 2022 (5.0%) 34,186 34,186 Total Debt 120,683 120,683 Less: Current Maturities 13,545 12,845 Long-Term Debt $ 107,138 $ 107,838
Schedule of Maturities of Long-Term Debt	Maturities of long-term debt for the periods subsequent to March 31, 2020, are as follows: Fiscal Year Amount April 2020 through December 2020 $ 12,845 2021 22,758 2022 23,410 2023 9,170 2024 8,890 Thereafter 43,610 Total $ 120,683

Lease Obligations (Tables)

Lease Obligations (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Summary of Operating Lease Related Terms and Discount Rates	The table below presents operating lease related terms and discount rates as of March 31, 2020: Weighted-average remaining lease term 4.1 years Weighted-average discount rate 6.59 %
Schedule of Component of Lease Cost	Components of lease costs were as follows for the three month periods ended March 31, 2020 and 2019: March 31, 2020 March 31, 2019 Operating lease cost $ 4,316 $ 8,667 Short-term lease cost 516 1,389 Variable lease cost 29 29 Total Lease Cost $ 4,861 $ 10,085
Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases	The following table summarizes the future minimum rental payments required under operating leases that had initial or remaining non-cancelable lease Fiscal Year Amount April 2020 through December 2020 $ 4,013 2021 3,977 2022 3,912 2023 2,765 2024 1,105 Thereafter 987 Total lease payments 16,759 Less imputed interest (1,685 ) Total Lease Liabilities $ 15,074

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Schedule of Cash Obligations	The following table sets forth our cash obligations for the periods presented (in thousands): Cash Obligations Total Apr – Dec 2020 2021 2022 2023 2024 Thereafter Aircraft Notes principal $ 70,000 $ — $ 7,000 $ 7,000 $ 7,000 $ 7,000 $ 42,000 Aircraft Notes interest $ 16,497 $ 5,647 $ 2,729 $ 2,451 $ 2,170 $ 1,890 $ 1,610 Other Loans principal $ 34,186 $ 7,198 $ 13,029 $ 13,959 $ — $ — $ — Other Loans interest $ 3,193 $ 1,664 $ 1,230 $ 299 $ — $ — $ — Operating lease obligations $ 16,759 $ 4,013 $ 3,977 $ 3,912 $ 2,765 $ 1,105 $ 987 Total $ 140,635 $ 18,522 $ 27,965 $ 27,621 $ 11,935 $ 9,995 $ 44,597

Earnings Per Share and Equity (

Earnings Per Share and Equity (Tables)	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Schedule of Calculations of Net Income Per Common Share	Calculations of net income per share of common stock, for the three month periods ended March 31, 2020 and 2019, were as follows (in thousands, except per share data): Three Months Ended March 31, 2020 2019 Net income (loss) $ 4,414 $ (3,084 ) Preferred stock dividends 165 — Net income (loss) applicable to common stockholders 4,249 (3,084 ) Basic weighted average common shares outstanding 54,863 54,863 Add: Incremental shares for: Dilutive effect of the 2015 Stock Option 559 — Dilutive effect of the Series C Preferred 13,567 N/A Diluted weighted average common shares outstanding 68,989 54,863 Net income (loss) per common share Basic $ 0.08 $ (0.06 ) Diluted $ 0.06 $ (0.06 )

Intangible Assets (Tables)

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets	Intangible assets at March 31, 2020 and December 31, 2019 consist of the following (in thousands): March 31, 2020 December 31, 2019 Gross Carrying Amount Gross Carrying Amount Trade names and air carrier certificate 5,300 5,300 Total $ 5,300 $ 5,300

Liquidity - Additional Informat

Liquidity - Additional Information (Detail) $ in Thousands	Apr. 13, 2020USD ($)	Sep. 30, 2020BlockHours	Aug. 31, 2020BlockHours	Jul. 31, 2020BlockHours	Jun. 30, 2020BlockHours	Sep. 30, 2019BlockHours	Aug. 31, 2019BlockHours	Jul. 31, 2019BlockHours	Oct. 01, 2020Employees	Apr. 20, 2020USD ($)	Mar. 31, 2020USD ($)
Liquidity Uncertainty And Going Concern [Line Items]
Interest payments deferred											$ 5,000
COVID-19 [Member]
Liquidity Uncertainty And Going Concern [Line Items]
Number of block hours operated | BlockHours						13,336	14,041	14,043
Subsequent Event [Member] | COVID-19 [Member]
Liquidity Uncertainty And Going Concern [Line Items]
Number of block hours operated | BlockHours		5,205	4,076	2,206	1,759
Percentage increase decrease in the block hours operated					88.00%
Subsequent Event [Member] | COVID-19 Pandemic And Pursuant To Workers Adjustment And Retraining Notification Act [Member] | Air Wisconsin [Member]
Liquidity Uncertainty And Going Concern [Line Items]
Number of employees estimated to be furloughed | Employees									871
Number of employees actually furloughed | Employees									305
Small Business Administration Payroll Protection Program [Member] | Subsequent Event [Member] | Air Wisconsin [Member]
Liquidity Uncertainty And Going Concern [Line Items]
Term Loan Maturity	2 years
Interest rate	1.00%
Aggregate loan amount received	$ 10,000
Percentage of the forgiven loan amount that may be used for non payroll costs	40.00%
Treasury Department Payroll Support Program [Member] | Subsequent Event [Member]
Liquidity Uncertainty And Going Concern [Line Items]
Payroll Support Agreement Awardable Amount										$ 42,200

Capacity Purchase Agreement w_2

Capacity Purchase Agreement with United - Additional Information (Detail) - United Airlines [Member] - CRJ-200 [Member]	1 Months Ended
	Feb. 28, 2017Aircraft
Property, Plant and Equipment [Line Items]
Date of expiration of the agreement	Feb. 1, 2023
Extension Period One [Member]
Property, Plant and Equipment [Line Items]
Period of extension of the agreement	2 years
Extension Period Two [Member]
Property, Plant and Equipment [Line Items]
Period of extension of the agreement	2 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Number of aircraft operated	65

Property and Equipment - Summar

Property and Equipment - Summary of aircraft (Detail) - CRJ-200 [Member] - Aircraft	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Line Items]
Owned	54	37
Leased	10	27

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Line Items]
Effective income tax rate reconciliation percent total	(32.10%)	(7.10%)
Effective Income Tax Rate, Federal statutory rate	21.00%	21.00%
Covid Nineteen [Member] | Refund Of AMT Credit [Member]
Income Tax Disclosure [Line Items]
Discrete tax benefits	$ 0.9

Debt - Schedule Of Long Term De

Debt - Schedule Of Long Term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Total Debt	$ 120,683	$ 120,683
Less: Current Maturities	13,545	12,845
Long-Term Debt	107,138	107,838
Notes Due December 31, 2025 [Member]
Total Debt	86,497	86,497
Credit Agreements Due Through 2022 [Member]
Total Debt	$ 34,186	$ 34,186

Debt - Additional information (

Debt - Additional information (Detail) - USD ($) $ in Thousands	1 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jul. 31, 2003
Debt [Member]
Deferred payment	$ 1,127	$ 3,945
City of Milwaukee, Wisconsin variable rate Industrial Development Bonds [Member]
Aggregate principal amount			$ 4,275

Debt - Schedule of Maturities o

Debt - Schedule of Maturities of Long-term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Maturities of Long-term Debt [Abstract]
April 2020 through December 2020	$ 12,845
2021	22,758
2022	23,410
2023	9,170
2024	8,890
Thereafter	43,610
Total	$ 120,683	$ 120,683

Lease Obligations - Additional

Lease Obligations - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Leases [Abstract]
Operating lease right of use asset	$ 19,761		$ 24,026
Current portion of operating lease liability	5,376		6,311
Long-term operating lease liability	9,698		$ 10,538
Cash payments included in the measurement of lease liabilities related to operating leases	$ 1,837	$ 4,167

Lease Obligations - Summary Of

Lease Obligations - Summary Of Weighted average Terms and Discount Rate For Operating Leases (Detail)	Mar. 31, 2020
Leases [Abstract]
Weighted-average remaining lease term	4 years 1 month 6 days
Weighted-average discount rate	6.59%

Lease Obligations - Schedule of

Lease Obligations - Schedule of Component Of Lease Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 4,316	$ 8,667
Short-term lease cost	516	1,389
Variable lease cost	29	29
Total Lease Cost	$ 4,861	$ 10,085

Lease Obligations - Schedule _2

Lease Obligations - Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Detail) $ in Thousands	Mar. 31, 2020USD ($)
Leases [Abstract]
April 2020 through December 2020	$ 4,013
2021	3,977
2022	3,912
2023	2,765
2024	1,105
Thereafter	987
Operating lease obligations, Total	16,759
Less imputed interest	(1,685)
Total Lease Liabilities	$ 15,074

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Thousands	Mar. 31, 2020USD ($)Letter_Of_Credit
Other Commitments [Line Items]
Number of outstanding letters of credit | Letter_Of_Credit	10
Letter of Credit [Member]
Other Commitments [Line Items]
Outstanding letters of credit | $	$ 814

Commitments and Contingencies_2

Commitments and Contingencies - Cash Obligations (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Contractual Obligation Fiscal Year Maturity [Line Items]
Long-term debt, Total	$ 120,683	$ 120,683
Long-term debt, due in 2020	12,845
Long-term debt, due in 2021	22,758
Long-term debt, due in 2022	23,410
Long-term debt, due in 2023	9,170
Long-term debt, due in 2024	8,890
Long-term debt, due Thereafter	43,610
Operating lease obligations, Total	16,759
Operating lease obligations, due in 2020	4,013
Operating lease obligations, due in 2021	3,977
Operating lease obligations, due in 2022	3,912
Operating lease obligations, due in 2023	2,765
Operating lease obligations, due in 2024	1,105
Operating lease obligations, due Thereafter	987
Total cash obligations	140,635
Total cash obligations, due in 2020	18,522
Total cash obligations, due in 2021	27,965
Total cash obligations, due in 2022	27,621
Total cash obligations, due in 2023	11,935
Total cash obligations, due in 2024	9,995
Total cash obligations, due Thereafter	44,597
Aircraft Notes principal [Member]
Contractual Obligation Fiscal Year Maturity [Line Items]
Long-term debt, Total	70,000
Long-term debt, due in 2021	7,000
Long-term debt, due in 2022	7,000
Long-term debt, due in 2023	7,000
Long-term debt, due in 2024	7,000
Long-term debt, due Thereafter	42,000
Aircraft Notes interest [Member]
Contractual Obligation Fiscal Year Maturity [Line Items]
Long-term debt, Total	16,497
Long-term debt, due in 2020	5,647
Long-term debt, due in 2021	2,729
Long-term debt, due in 2022	2,451
Long-term debt, due in 2023	2,170
Long-term debt, due in 2024	1,890
Long-term debt, due Thereafter	1,610
Other Loans principal [Member]
Contractual Obligation Fiscal Year Maturity [Line Items]
Long-term debt, Total	34,186
Long-term debt, due in 2020	7,198
Long-term debt, due in 2021	13,029
Long-term debt, due in 2022	13,959
Other Loans interest [Member]
Contractual Obligation Fiscal Year Maturity [Line Items]
Long-term debt, Total	3,193
Long-term debt, due in 2020	1,664
Long-term debt, due in 2021	1,230
Long-term debt, due in 2022	$ 299

Related-Party Transactions - Ad

Related-Party Transactions - Additional Information (Detail) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2020USD ($)$ / sharesshares	Mar. 31, 2020USD ($)	Mar. 31, 2019USD ($)	Jan. 17, 2020Aircraft
Related Party Transaction [Line Items]
Payments to related parties pursuant to certain aircraft and engines leases and for other professional services		$ 210	$ 824
Operating lease agreements term		April 2010 through January 2020
Series C Redeemable Convertible Preferred Stock [Member]
Related Party Transaction [Line Items]
Common stock issuable upon conversion of temporary equity | shares	16,500,000
Southshore [Member] | CRJ-200 [Member]
Related Party Transaction [Line Items]
Number Of Flights Acquired | Aircraft				3
Business acquistion liabilites assumed	$ 3,466
Southshore [Member] | CRJ-200 [Member] | Series C Redeemable Convertible Preferred Stock [Member]
Related Party Transaction [Line Items]
Business acquisition shares issued or issuable | shares	4,000
Business acquisition shares issued or issuable value	$ 13,200
Business acquisiton shares | $ / shares	$ 3.30
Air Wisconsin [Member]
Related Party Transaction [Line Items]
Payments to related parties pursuant to certain aircraft and engines leases and for other professional services		$ 150	764
AWAC Aviation Inc [Member] | Financial Advisory And Management Services [Member]
Related Party Transaction [Line Items]
Monthly recurring fee payable pursuant to service agreement		20
Payment For Management services fee		60	60
Aircraft [Member] | Air Wisconsin [Member]
Related Party Transaction [Line Items]
Payments to related parties pursuant to certain aircraft and engines leases and for other professional services		66	270
Engines To Support Aircraft Fleet [Member] | Air Wisconsin [Member]
Related Party Transaction [Line Items]
Payments to related parties pursuant to certain aircraft and engines leases and for other professional services		$ 84	$ 494

Earnings Per Share and Equity -

Earnings Per Share and Equity - Calculations of Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income (loss)	$ 4,414	$ (3,084)
Preferred Stock Dividends	165
Net income (loss) applicable to common stockholders	$ 4,249	$ (3,084)
Basic weighted average common shares outstanding	54,863	54,863
Add: Incremental shares for:
Dilutive effect of the 2015 Stock Option	559
Dilutive effect of the Series C Shares Preferred	13,567
Diluted weighted average common shares outstanding	68,989	54,863
Net income (loss) per common share
Basic	$ 0.08	$ (0.06)
Diluted	$ 0.06	$ (0.06)

Earnings Per Share and Equity_2

Earnings Per Share and Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2020	Sep. 29, 2020	Jul. 01, 2020	Jun. 30, 2020	Apr. 20, 2020	Apr. 15, 2020	Jan. 31, 2020	Mar. 31, 2020
Class of Stock [Line Items]
Incremental effect attributable to dilutive effect of conversion of temporary equity										13,567,000
Series C Redeemable Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Temporary equity stock issued during the period shares new issues									4,000,000	4,000,000
Common stock issuable upon conversion of temporary equity									16,500,000
Dividend rate									6.00%
Incremental effect attributable to dilutive effect of conversion of temporary equity										13,567,000
Series C Redeemable Convertible Preferred Stock [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Dividend declared				$ 198		$ 198		$ 165
Date of dividend declaration				Sep. 29, 2020		Jun. 30, 2020		Apr. 15, 2020
Date of dividend payment			Sep. 30, 2020		Jul. 1, 2020		Apr. 20, 2020
Series C Preferred Stock [Member]
Class of Stock [Line Items]
Minimum percentage of shares issued to outstanding stock									5.00%
Preferred stock, redemption date									Dec. 31, 2024
Series C Preferred Stock [Member] | Southshore [Member] | Investors' Rights Agreement [Member]
Class of Stock [Line Items]
Share requisition period after complying with reporting requirements									180-day period
Shares issued upon conversion of preferred shares, percentage of outstanding stock maximum									40.00%
Minimum anticipated aggregate offering price, net of selling expenses									$ 10,000
Series C Preferred Stock [Member] | Minimum [Member]
Class of Stock [Line Items]
Preferred stock, shares outstanding									800,000
Series C Preferred Stock [Member] | Forecast [Member]
Class of Stock [Line Items]
Percentage of increase in preferential dividends	1.00%
Preferred stock, liquidation preference		$ 0.80
Preferred stock, convertible, threshold trading days		90
Preferred stock, convertible, threshold calendar day		45
Preferred stock, convertible, conversion price, adjustment percentage		5.00%
Conversion of preferred stock, maximum amount converted		$ 16,500,000
Cumulative quarterly preferred stock dividend rate percentage		0.50%

Stock Options - Additional Info

Stock Options - Additional Information (Detail) - 2015 Stock Option [Member] - $ / shares	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted		559
Stock option issued, exercise price		$ 0.21
Value of the option at the date of grant	$ 0.07
Options granted, life	7 years
Options granted, risk free interest rate	2.01%
Options granted, expected volatility	157.10%

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	Jan. 17, 2020	Mar. 31, 2020	Mar. 31, 2019
Business Acquisition [Line Items]
Cash payments for interest		$ 0	$ 5
Cash payments for income taxes		0	29
Cash payments included in the measurement of lease liabilities related to operating leases		$ 1,837	$ 4,167
CRJ-200 [Member] | Southshore [Member]
Business Acquisition [Line Items]
Liabilities assumed in a business acquisition	$ 3,466
Fair value of assets acquired in a non cash transaction	$ 16,666
Series C Redeemable Convertible Preferred Stock [Member] | CRJ-200 [Member] | Southshore [Member]
Business Acquisition [Line Items]
Non cash transaction in a business combination shares issued	13,200

Intangible Assets - Components

Intangible Assets - Components of Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Trade names and air carrier certificate	$ 5,300	$ 5,300
Total	$ 5,300	$ 5,300

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 11, 2020	May 22, 2020	Oct. 31, 2020
Air Wisconsin [Member] | United Capacity Purchase Agreement [Member] | Maximum [Member]
Subsequent Event [Line Items]
Long term purchase agreement, extended term of contract			3 years
Air Wisconsin [Member] | United Capacity Purchase Agreement [Member] | Minimum [Member]
Subsequent Event [Line Items]
Long term purchase agreement, extended term of contract			2 years
Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate purchase price for aircraft acquired	$ 818	$ 3,000