Organization and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Weighted Average Number of Shares Outstanding and Income Per Share

	Three Months Ended March 31,
	2021		2020
Numerator for basic and diluted earnings per share:
Net income (loss)	$	(47,917)	$	4,074
Denominator:
Weighted average shares outstanding		64,036		59,609
Dilutive effect of stock-based awards		—		785
Diluted weighted average shares outstanding		64,036		60,394
Anti-dilutive stock-based awards excluded		12,234		12,161
Net income (loss) per common share:
Basic	$	(0.75)	$	0.07
Diluted	$	(0.75)	$	0.07

Summary of Changes in Estimated Product Warranty Liabilities

Changes in our estimated product warranty liabilities were as follows (in thousands):

	Three Months Ended March 31,
	2021		2020
Balance, beginning of period	$	769	$	1,476
Utilization of reserve		(231)		(171)
Warranty expense (benefit)		406		(85)
Balance, end of period	$	944	$	1,220