Net (Loss) Income per Share - Basic and Diluted Income per Share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net (loss) income	$ (2,408,000)	$ 1,258,000
Denominator:
Weighted-average shares outstanding— basic (in shares)	71,001,906	74,848,080
Effect of dilutive securities (in shares)	0	3,951,168
Weighted-average shares outstanding— diluted (in shares)	71,001,906	78,799,248
Basic net (loss) income per share (in dollars per share)	$ (0.03)	$ 0.02
Diluted net (loss) income per share (in dollars per share)	$ (0.03)	$ 0.02