Organization and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2021

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,
	2021		2020		2021		2020
Numerator for basic and diluted earnings per share:
Net income (loss)	$	48,524	$	(873)	$	(46,510)	$	(27,558)
Denominator:
Weighted average shares outstanding		66,192		63,496		65,139		61,159
Dilutive effect of stock-based awards		6,249		—		—		—
Diluted weighted average shares outstanding		72,441		63,496		65,139		61,159
Anti-dilutive stock-based awards excluded		3,481		12,793		8,920		12,904
Net loss per common share:
Basic	$	0.73	$	(0.01)	$	(0.71)	$	(0.45)
Diluted	$	0.67	$	(0.01)	$	(0.71)	$	(0.45)

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,
	2021		2020
Balance, beginning of period	$	769	$	1,476
Utilization of reserve		(582)		(539)
Warranty expense (benefit)		1,176		(192)
Balance, end of period	$	1,363	$	745