Organization and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2021

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,
	2021		2020		2021		2020
Numerator for basic and diluted earnings per share:
Net loss	$	(47,117)	$	(30,759)	$	(95,034)	$	(26,685)
Denominator:
Weighted average shares outstanding		65,166		60,346		64,604		59,977
Dilutive effect of stock-based awards		—		—		—		—
Diluted weighted average shares outstanding		65,166		60,346		64,604		59,977
Anti-dilutive stock-based awards excluded		10,537		12,773		8,950		12,866
Net loss per common share:
Basic	$	(0.72)	$	(0.51)	$	(1.47)	$	(0.44)
Diluted	$	(0.72)	$	(0.51)	$	(1.47)	$	(0.44)

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,
	2021		2020
Balance, beginning of period	$	769	$	1,476
Utilization of reserve		(481)		(350)
Warranty expense (benefit)		613		(114)
Balance, end of period	$	901	$	1,012