Organization and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Weighted Average Number of Shares Outstanding and Income Per Share

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Numerator for basic and diluted earnings per share:
Net income (loss)	$	(30,759)	$	738	$	(26,685)	$	7,157
Denominator:
Weighted average shares outstanding		60,346		59,187		59,977		59,051
Dilutive effect of stock-based awards		—		813		—		825
Diluted weighted average shares outstanding		60,346		60,000		59,977		59,876
Anti-dilutive stock-based awards excluded		12,773		12,056		12,866		12,111
Net income (loss) per common share:
Basic	$	(0.51)	$	0.01	$	(0.44)	$	0.12
Diluted	$	(0.51)	$	0.01	$	(0.44)	$	0.12

Summary of Changes in Estimated Product Warranty Liabilities

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

	Six Months Ended June 30,
	2020		2019
Balance, beginning of period	$	1,476	$	898
Utilization of reserve		(350)		(250)
Warranty expense (benefit)		(114)		634
Balance, end of period	$	1,012	$	1,282