Stock-Based Compensation

The Company recognizes compensation expense for stock-based compensation in accordance with ASC Topic No. 718. For employee stock-based awards, the Company calculates the fair value of the award on the date of grant using the Black-Scholes method for stock options; the expense is recognized over the service period for awards expected to vest. For non-employee stock-based awards, the Company calculates the fair value of the award on the date of grant in the same manner as employee awards, however, the awards are revalued at the end of each reporting period and the pro rata compensation expense is adjusted accordingly until such time the nonemployee award is fully vested, at which time the total compensation recognized to date shall equal the fair value of the stock-based award as calculated on the measurement date, which is the date at which the award recipient’s performance is complete.

The estimation of stock-based awards that will ultimately vest requires judgment, and to the extent actual results or updated estimates differ from original estimates, such amounts are recorded as a cumulative adjustment in the period estimates are revised. The Company considers many factors when estimating expected forfeitures, including types of awards, employee class, and historical experience.