Organization and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Weighted Average Number of Shares Outstanding and Income Per Share

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Numerator for basic and diluted earnings per share:
Net income (loss)	$	(873)	$	6,104	$	(27,558)	$	13,261
Denominator:
Weighted average shares outstanding		63,496		59,278		61,159		59,128
Dilutive effect of stock-based awards		—		781		—		810
Diluted weighted average shares outstanding		63,496		60,059		61,159		59,938
Anti-dilutive stock-based awards excluded		12,793		12,477		12,904		12,546
Net income (loss) per common share:
Basic	$	(0.01)	$	0.10	$	(0.45)	$	0.22
Diluted	$	(0.01)	$	0.10	$	(0.45)	$	0.22

Summary of Changes in Estimated Product Warranty Liabilities

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

	Nine Months Ended September 30,
	2020		2019
Balance, beginning of period	$	1,476	$	898
Utilization of reserve		(539)		(718)
Warranty expense (benefit)		(192)		891
Balance, end of period	$	745	$	1,071