Blade Air Mobility, Inc. Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Stock-Based Compensation Expense (Details) - Stock Options And Restricted Stock - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 9,621	$ 490	$ 317
Software development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	499	29	35
General and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	8,887	461	270
Selling and marketing
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 235	$ 0	$ 12