(1) Consists primarily of non-cash share-based compensation expense related to our stock incentive plans and earn-out arrangement, and the employer payroll taxes related to our stock options and restricted stock units.

(2) Consists of severance and other employee separation costs, and cease use charges for operating lease right-of-use assets due to reduction of leased office spaces.

(3) Consists of acquisition transaction costs.

(4) Consists of the non-cash fair value measurement change for public and private warrants.

(5) Represents the non-cash fair-value measurement change related to our earn-out liability.

(6) Represents the payroll tax related to earn-out shares issuance and release in the three months ended March 31, 2022.