Phunware, Inc. Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Warrants (Details) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Class of Warrant or Right [Roll Forward]
Warrants Outstanding (in shares)	7,676,112	5,996,112
2020 Convertible Note warrants
Class of Warrant or Right [Roll Forward]
Exercise price per share (in dollars per share)	$ 2.25	$ 4.00
Warrants Outstanding (in shares)	3,840,000	2,160,000
Common stock warrant (Series D-1)
Class of Warrant or Right [Roll Forward]
Exercise price per share (in dollars per share)	$ 5.54	$ 5.54
Warrants Outstanding (in shares)	14,866	14,866
Common stock warrants (Series F)
Class of Warrant or Right [Roll Forward]
Exercise price per share (in dollars per share)	$ 9.22	$ 9.22
Warrants Outstanding (in shares)	377,402	377,402
Public Warrants (PHUNW)
Class of Warrant or Right [Roll Forward]
Exercise price per share (in dollars per share)	$ 11.50	$ 11.50
Warrants Outstanding (in shares)	1,761,291	1,761,291
Private Placement Warrants
Class of Warrant or Right [Roll Forward]
Exercise price per share (in dollars per share)	$ 11.50	$ 11.50
Warrants Outstanding (in shares)	1,658,381	1,658,381
Unit Purchase Option Warrants
Class of Warrant or Right [Roll Forward]
Exercise price per share (in dollars per share)	$ 11.50	$ 11.50
Warrants Outstanding (in shares)	24,172	24,172