Also, if the employee is laid off then it is not enforceable unless the company pays the ex-employee during the term of the non-compete the difference between what they had been paying them and whatever the employee earns in whatever non-competing jobs they take during that time.
For consultants as opposed to employees to be enforceable the contractor has to be earning $250k (again in 2020 dollars).
The law also has something to say about employers that don't want to let employees have other jobs, or do contracting, or do self-employment. Employers can only prohibit that if the employee is making at least twice minimum wage, unless that other work could cause safety issues or interfere with the reasonable and normal scheduling expectations of the employer.