Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Employee Stock Purchase Plan Valuation Assumptions

It was estimated by applying the Black-Scholes option-pricing model to the purchase period in the offering period using the following assumptions:

	June 15, 2019
Grant price	$	2.49
Expected term	3 months
Expected volatility	62.97		%
Risk-free interest rate	2.21		%
Expected dividend yield	—		%