Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Contract with Customer, Asset and Liability

Deferred revenue related to these performance obligations that are satisfied over time was included in the following consolidated balance sheet accounts in the amounts shown as of March 31, 2020 and December 31, 2019 (in thousands):

	March 31, 2020		December 31, 2019
Deferred revenue	$	3,833	$	3,465
Other long-term liabilities	6,626		5,656
Total	$	10,459	$	9,121

Summary of Reconciliation of Change in Product Warranty Liabilities

The following table provides a reconciliation of the change in product warranty liabilities from December 31, 2019 through March 31, 2020 (in thousands):

Balance at December 31, 2019	$	16,724
Provision for warranties issued during the period	4,814
Settlements made during the period	(3,390		)
Decreases in warranty estimates	(1,387		)
Balance at March 31, 2020	$	16,761

As of March 31, 2020 and December 31, 2019, total product warranty reserves of $16.8 million and $16.7 million, respectively, were included in the following consolidated balance sheet accounts (in thousands):

	March 31, 2020		December 31, 2019
Other current liabilities	$	6,427	$	4,707
Other long-term liabilities	10,334		12,017
Total warranty reserves	$	16,761	$	16,724

Schedule of Anti-Dilutive Securities

Potentially dilutive securities not included in the calculation of diluted net loss per share (because inclusion would be anti-dilutive) are as follows (in thousands, in common stock equivalent shares):

	Three Months Ended March 31,
	2020	2019
Warrants to purchase common stock	609	686
Options to purchase common stock	5,710	5,475
Awards granted under the ESPP	198	142
	6,517	6,303