Description of Business and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Description of Business and Summary of Significant Accounting Policies

Schedule of changes in the product warranty liability

The following table presents the changes in the product warranty liability for the three months ended March 31, 2019 (in thousands):

	Warranty Liability
Balance at December 31, 2018	$	2,524
Warranty costs accrued		905
Warranty claims		(1,030)
Balance at March 31, 2019	$	2,399

Schedule of reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per share

The following table presents the reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per share (in thousands):

	Three Months Ended
	March 31,
	2019		2018
Numerator:
Net income (loss)	$	(1,970)	$	966
Denominator:
Weighted average common stock outstanding for basic net income (loss) per common share		26,563		25,904
Effect of dilutive securities—stock options and restricted stock units		—		1,622
Weighted average common shares and dilutive securities outstanding		26,563		27,526

Schedule of anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income per share

The following weighted-average common stock equivalents were anti-dilutive and therefore were excluded from the calculation of diluted net income (loss) per share (in thousands):

	Three Months Ended
	March 31,
	2019	2018
Options to purchase common stock	1,065	—
Restricted stock units	1,114	166
Total	2,179	166