Share-based Compensation Expense	3 Months Ended
Mar. 31, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-based Compensation Expense	Note 6. Share-based compensation expense The Company currently maintains the Starry, Inc. Amended and Restated 2014 Stock Option and Grant Plan (the “Starry Stock Plan”). The Starry Stock Plan provides our employees (including the named executive officers), consultants, directors and other key persons and those of our any subsidiary the opportunity to participate in the equity appreciation of our business through the receipt of stock options to purchase shares of our common stock, restricted stock and restricted stock units. We believe that such awards encourage a sense of proprietorship and stimulate interest in our development and financial success. The Starry Stock Plan is no longer available for use for the grant of future awards, but will continue to govern the terms of awards that were previously granted and that remain outstanding. In connection with the Business Combination, the Board of Directors adopted the Starry Group Holdings, Inc. 2022 Equity Incentive Plan ("Equity Incentive Plan"), under which the Company may grant cash and equity incentive awards to directors, employees (including named executive officers) and consultants. The Equity Incentive Plan became effective on March 29, 2022 and replaced the Starry Stock Plan, allowing the Company to grant up to 22,775,288 shares of Class A common stock. The Board of Directors also adopted the Starry Group Holdings, Inc. 2022 Employee Stock Purchase Plan (the “ESPP”) in connection with the Business Combination, under which employees (including named executive officers) may purchase common stock through payroll deductions of up to 20% of their eligible compensation. The ESPP became effective on March 29, 2022 with no activity for the three months ended March 31, 2022. The Company did not grant any stock options during the three months ended March 31, 2022 and 2021. In May 2021 and September 2021, pursuant to the Starry Stock Plan, the Company granted 736,315 and 82,697 shares of restricted stock units (“RSUs”), respectively, to employees in exchange for employment services. No additional RSUs were granted during the three months ended March 31, 2022. The RSUs have a service condition of 4 years and performance condition that is linked to the occurrence of a liquidity event. The liquidity event requirement will be satisfied on the first to occur of: (1) the day following the expiration of the lock up period that is in effect following a listing event (defined below), provided that a termination event has not occurred prior to such time and (2) the consummation of a sale event. A listing event is defined as (i) an initial public offering or direct listing of any class of common stock of the Company or any parent or subsidiary or successor of the Company formed for the purpose of effecting such transaction or (ii) a merger (or similar transaction) with a special purpose acquisition company, the result of which is that any class of common stock of the Company or the parent or successor entity of the Company is listed on the New York Stock Exchange, the Nasdaq Stock Market or other securities exchange. The grant-date fair value of the RSUs was $1.47 per share. Due to the consummation of the Business Combination on March 29, 2022, the Company has recognized $3,401 of share-based compensation expense for RSUs since the listing event occurred and the satisfaction of the liquidity event will be achieved solely based on the passage of time (i.e., the expiration of the lock up period). As of March 31, 2022, there was approximately $3,271 of unrecognized share-based compensation expense related to RSUs, which is expected to be recognized over a weighted-average period of 1.3 years. Share-based compensation expense related to stock options for the three months ended March 31, 2022 and 2021 was $306 and $220, respectively, and is included within research and development expense and selling, general and administrative expense on the accompanying condensed consolidated statements of operations. As of March 31, 2022, there was approximately $2,895 of unrecognized compensation cost related to stock options which is expected to be recognized over a weighted-average period of 2.3 years.

Share-based Compensation Expense

3 Months Ended

Mar. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Note 6. Share-based compensation expense

The Company currently maintains the Starry, Inc. Amended and Restated 2014 Stock Option and Grant Plan (the “Starry Stock Plan”). The Starry Stock Plan provides our employees (including the named executive officers), consultants, directors and other key persons and those of our any subsidiary the opportunity to participate in the equity appreciation of our business through the receipt of stock options to purchase shares of our common stock, restricted stock and restricted stock units. We believe that such awards encourage a sense of proprietorship and stimulate interest in our development and financial success. The Starry Stock Plan is no longer available for use for the grant of future awards, but will continue to govern the terms of awards that were previously granted and that remain outstanding.

In connection with the Business Combination, the Board of Directors adopted the Starry Group Holdings, Inc. 2022 Equity Incentive Plan ("Equity Incentive Plan"), under which the Company may grant cash and equity incentive awards to directors, employees (including named executive officers) and consultants. The Equity Incentive Plan became effective on March 29, 2022 and replaced the Starry Stock Plan, allowing the Company to grant up to 22,775,288 shares of Class A common stock.

The Board of Directors also adopted the Starry Group Holdings, Inc. 2022 Employee Stock Purchase Plan (the “ESPP”) in connection with the Business Combination, under which employees (including named executive officers) may purchase common stock through payroll deductions of up to 20% of their eligible compensation. The ESPP became effective on March 29, 2022 with no activity for the three months ended March 31, 2022.

The Company did not grant any stock options during the three months ended March 31, 2022 and 2021.

In May 2021 and September 2021, pursuant to the Starry Stock Plan, the Company granted 736,315 and 82,697 shares of restricted stock units (“RSUs”), respectively, to employees in exchange for employment services. No additional RSUs were granted during the three months ended March 31, 2022. The RSUs have a service condition of 4 years and performance condition that is linked to the occurrence of a liquidity event. The liquidity event requirement will be satisfied on the first to occur of: (1) the day following the expiration of the lock up period that is in effect following a listing event (defined below), provided that a termination event has not occurred prior to such time and (2) the consummation of a sale event. A listing event is defined as (i) an initial public offering or direct listing of any class of common stock of the Company or any parent or subsidiary or successor of the Company formed for the purpose of effecting such transaction or (ii) a merger (or similar transaction) with a special purpose acquisition company, the result of which is that any class of common stock of the Company or the parent or successor entity of the Company is listed on the New York Stock Exchange, the Nasdaq Stock Market or other securities exchange. The grant-date fair value of the RSUs was $1.47 per share. Due to the consummation of the Business Combination on March 29, 2022, the Company has recognized $3,401 of share-based compensation expense for RSUs since the listing event occurred and the satisfaction of the liquidity event will be achieved solely based on the passage of time (i.e., the expiration of the lock up period). As of March 31, 2022, there was approximately $3,271 of unrecognized share-based compensation expense related to RSUs, which is expected to be recognized over a weighted-average period of 1.3 years.

Share-based compensation expense related to stock options for the three months ended March 31, 2022 and 2021 was $306 and $220, respectively, and is included within research and development expense and selling, general and administrative expense on the accompanying condensed consolidated statements of operations. As of March 31, 2022, there was approximately $2,895 of unrecognized compensation cost related to stock options which is expected to be recognized over a weighted-average period of 2.3 years.