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Organization and Operations - Additional Information (Detail) |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |
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Nov. 04, 2020 USD ($) | Jun. 15, 2020 Air-craft | Jun. 01, 2020 Air-craft | May 19, 2020 Air-craft | Apr. 03, 2020 Air-craft | Jan. 02, 2020 Air-craft | Nov. 26, 2019 Air-craft | Nov. 25, 2019 Air-craft | Sep. 11, 2018 USD ($) $ / shares shares | Aug. 14, 2018 USD ($) $ / shares shares | Aug. 08, 2018 shares | Oct. 31, 2020 USD ($) | Apr. 30, 2020 USD ($) | Nov. 30, 2019 Air-craft | Sep. 30, 2019 USD ($) Air-craft shares | Jul. 31, 2019 Air-craft | Apr. 30, 2019 shares | Jan. 31, 2019 Air-craft | Jul. 31, 2018 shares | Sep. 30, 2020 USD ($) Daily_Departure State Air-craft City shares | Sep. 30, 2019 USD ($) shares | Sep. 30, 2018 USD ($) shares | Nov. 14, 2020 USD ($) | Nov. 13, 2020 USD ($) | Oct. 30, 2020 USD ($) | Apr. 02, 2019 Air-craft
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of states in which entity operates | State |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 39 |  |  |  |  |  |
Number of aircrafts operated | Air-craft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 146 |  |  |  |  |  |
Number of cities in which entity operates | City |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 102 |  |  |  |  |  |
Number of daily departures | Daily_Departure |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 373 |  |  |  |  |  |
Common stock, stock split |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | effected a 2.5-for-1 stock split |  |  |  |  |  |
Stock split ratio |  |  |  |  |  |  |  |  |  |  | 2.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized | shares |  |  |  |  |  |  |  |  |  |  | 125,000,000 |  |  |  | 125,000,000 |  |  |  |  | 125,000,000 | 125,000,000 |  |  |  |  |
Preferred stock, shares authorized | shares |  |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  |  | 5,000,000 |  |  |  |  | 5,000,000 | 5,000,000 |  |  |  |  |
Stock issued during period, shares, new issues | shares |  |  |  |  |  |  |  |  | 1,344,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, warrants issued | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,600,953 |  |  |  |  | 0 | 3,600,953 |  |  |  |  |
Gross proceeds from sale of shares | $ |  |  |  |  |  |  |  |  | $ 124,247,820 |  |  |  |  |  |  |  |  |  |  |  |  | $ 124,246,000 |  |  |  |
Cash and cash equivalents | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 68,855,000 |  |  |  |  | $ 99,395,000 | $ 68,855,000 |  |  |  |  |
Drew amount from undrawn revolving credit facility | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 23,000,000 | 171,658,000 | $ 187,703,000 |  |  |  |
CARES act grant amount | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 92,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
CARES act, increasing percentage of payroll |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |
CARES act, additional grant amount | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,700,000 |  |  |  |  |  |
CARES act, total grant amount | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 95,200,000 |  |  |  |  |  |
CARES act, utilized offset payroll expenses | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 83,800,000 |  |  |  |  |  |
CARES act, deferred offset future payroll cost | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,400,000 |  |  |  |  |  |
Secured loan facility interest rate description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Accrued interest on the loans is payable in arrears on the first business day following the 14th day of each March, June, September and December (beginning with December 15, 2020), and on the maturity date. |  |  |  |  |  |
American capacity purchase agreement termination notice period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 days |  |  |  |  |  |
Maximum number of aircraft to withdraw in the event company fails to meet new/ revise performance metrics | Air-craft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14 |  |  |  |  |  |
Maximum number of aircraft to permanently withdraw in the event company fails to meet new/ revise performance metrics | Air-craft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |  |
Number of aircraft converted to be utilized as operational spares | Air-craft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2
Number of aircraft permanently withdraw due to failure to meet new/revised performance metrics | Air-craft |  | 2 |  | 2 |  | 2 |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Number of additional aircraft permanently withdrawn due to company's failure to meet certain performance metrics | Air-craft |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of aircraft removed due to failure to meet new/revised performance metrics | Air-craft |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of aircraft that would be withdrawn at any time due to failure to meet new/revised performance metrics | Air-craft |  |  |  |  | 3 | 3 |  |  |  |  |  |  |  | 3 | 3 |  |  |  |  |  |  |  |  |  |  |
Number of deferred aircraft elected to remove | Air-craft |  |  | 1 |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notice period for termination of agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Our United Capacity Purchase Agreement permits United, subject to certain conditions, including the payment of certain costs tied to aircraft type, to terminate the agreement in its discretion, or remove aircraft from service, by giving us notice of 90 days or more. |  |  |  |  |  |
Prepayment | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,672,000 |  |  |  |  |
United capacity purchase agreement termination notice period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |  |  |
CRJ-700 Aircraft [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of aircrafts operated | Air-craft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 |  |  |  |  |  |
CRJ-700 Aircraft [Member] | United [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft lease term |  |  |  |  |  |  | 7 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
E-175 Aircraft [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of aircrafts operated | Air-craft |  |  |  |  |  |  | 18 |  |  |  |  |  |  |  |  |  |  |  |  | 60 |  |  |  |  |  |
Lease expiration year |  |  |  |  |  |  | 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
E-175 Aircraft [Member] | United [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of aircrafts operated | Air-craft |  |  |  |  |  |  | 42 |  |  |  |  |  |  |  |  |  |  |  |  | 42 |  |  |  |  |  |
Aircraft lease extension period |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
E175LL Aircraft [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of additional aircrafts | Air-craft |  |  |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years in operation |  |  |  |  |  |  | 12 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Air drafts delivery month and year description. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Deliveries of the new E175LL aircraft were scheduled to begin in May 2020. |  |  |  |  |  |
Termination of aircraft operation, description |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Commencing five (5) years after the actual in-service date, United has the right to remove the E175LL aircraft from service by giving us notice of 90 days or more, subject to certain conditions, including the payment of certain wind-down expenses plus, if removed prior to the ten (10) year anniversary of the in-service date, certain accelerated margin payments. |  |  |  |  |  |
American Airlines Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.10% |  |  |  |  | 0.00% | 7.10% | 7.20% |  |  |  |
CRJ-900 Aircraft [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of aircrafts operated | Air-craft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 54 |  |  |  |  |  |
CRJ-900 Aircraft [Member] | Aircraft Lease Expire In 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operated aircrafts expired or set to expire | Air-craft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 31 |  |  |  |  |  |
Lease expiration year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2021 |  |  |  |  |  |
CRJ-900 Aircraft [Member] | Aircraft Lease Expire In 2022 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operated aircrafts expired or set to expire | Air-craft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16 |  |  |  |  |  |
Lease expiration year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2022 |  |  |  |  |  |
CRJ-900 Aircraft [Member] | Aircraft Lease Expire In 2025 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operated aircrafts expired or set to expire | Air-craft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 |  |  |  |  |  |
Lease expiration year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2025 |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured loans to the airline industry | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25,000,000,000 |  |  |  |  |  |
Capacity purchase agreement, expiration year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2025 |  |  |  |  |  |
Maximum [Member] | E-175 Aircraft [Member] | United [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease expiration year |  |  |  |  |  |  | 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capacity purchase agreement, expiration year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2021 |  |  |  |  |  |
Minimum [Member] | E-175 Aircraft [Member] | United [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease expiration year |  |  |  |  |  |  | 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured loans to the airline industry | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 195,000,000.0 | $ 152,000,000.0 | $ 43,000,000.0 |
Secured loan facility term |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured loan facility remaining borrowing capacity | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |
Subsequent Event [Member] | United [Member] | United Capacity Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of years in operation | 12 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment | $ | $ 85,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment term | 4 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured loan facility maximum borrowing capacity | $ |  |  |  |  |  |  |  |  |  |  |  | $ 200,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
LIBOR [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured loan facility interest rate |  |  |  |  |  |  |  |  |  |  |  | 3.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Drew amount from undrawn revolving credit facility | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 23,000,000.0 |  |  |  |  |  |
2018 Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock withheld to cover tax withholding requirements upon vesting to restricted stock units shares | shares |  |  |  |  |  |  |  |  |  | 314,198 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock, shares issued net of shares for tax withholdings | shares |  |  |  |  |  |  |  |  |  | 651,824 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 Equity Incentive Plan [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,249,147 |  |  |  |  |  |  |
Number of Shares, Granted | shares |  |  |  |  |  |  |  |  |  | 1,266,034 |  |  |  |  |  |  | 3,481,370 |  |  | 910,297 | 321,926 |  |  |  |  |
Number of Shares, vested | shares |  |  |  |  |  |  |  |  |  | 966,022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 Equity Incentive Plan [Member] | Restricted Stock [Member] | Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional restricted common stock shares issued | shares |  |  |  |  |  |  |  |  |  | 983,113 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2011 and 2017 Plans [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Shares, Granted | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |
2011 and 2017 Plans [Member] | Restricted Stock [Member] | Employees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of common stock shares existing unvested restricted phantom units | shares |  |  |  |  |  |  |  |  |  | 491,915 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cancellation of common stock shares existing of unvested restricted stock | shares |  |  |  |  |  |  |  |  |  | 491,198 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
IPO [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues | shares |  |  |  |  |  |  |  |  |  | 9,630,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued, price per share | $ / shares |  |  |  |  |  |  |  |  |  | $ 12.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds of initial public offering | $ |  |  |  |  |  |  |  |  |  | $ 115,600,000 |  |  |  |  |  |  |  |  |  | $ 124,200,000 |  |  |  |  |  |
Underwriter Options [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, warrants issued | shares |  |  |  |  |  |  |  |  |  | 1,444,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchased Directly From Company [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues | shares |  |  |  |  |  |  |  |  | 723,985 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchased Directly From Selling Shareholders [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, new issues | shares |  |  |  |  |  |  |  |  | 620,515 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Firm Shares and Option Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued, price per share | $ / shares |  |  |  |  |  |  |  |  | $ 12.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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