Balance Sheet Details (Tables)

3 Months Ended

Mar. 31, 2020

Balance Sheet Details

Schedule of short-term investments

Short-term investments consisted of the following (in thousands):

	At March 31, 2020
	Maturity	Amortized cost		Unrealized		Unrealized		Estimated
	(in years)	or cost		gains		losses		fair value
U.S. government agency bonds	less than 1		1,500		3		—		1,503
Bank certificates of deposit	less than 1		12,400		21		(11)		12,410
Commercial paper	less than 1		8,973		5		(16)		8,962
Corporate notes	less than 3		63,719		198		(345)		63,572
Asset-backed securities	less than 3		23,591		87		(29)		23,649
Total		$	110,183	$	314	$	(401)	$	110,096
	At December 31, 2019
	Maturity	Amortized cost		Unrealized		Unrealized		Estimated
	(in years)	or cost		gains		losses		fair value
U.S. government bonds	less than 1	$	—	$	—	$	—	$	—
U.S. government agency bonds	less than 1		—		—		—		—
Bank certificates of deposit	less than 1		12,999		7		—		13,006
Commercial paper	less than 1		7,475		8		—		7,483
Corporate notes	less than 3		65,354		295		(10)		65,639
Asset-backed securities	less than 3		25,333		99		(7)		25,425
Total		$	111,161	$	409	$	(17)	$	111,553

Schedule of accounts receivable, net

Accounts receivable consisted of the following (in thousands):

	March 31,		December 31,
	2020		2019
Accounts receivable	$	30,472	$	39,657
Allowance for credit losses		(1,587)		(1,240)
	$	28,885	$	38,417

Schedule of inventory

Inventory, net consisted of the following (in thousands):

	March 31,		December 31,
	2020		2019
Finished goods	$	18,108	$	32,108
Work in process		2,730		3,884
Raw material		6,861		6,586
	$	27,699	$	42,578

Schedule of accrued liabilities

Accrued liabilities consisted of the following (in thousands):

	March 31,		December 31,
	2020		2019
Accrued bonuses	$	4,149	$	13,525
Accrued vacation benefits		3,201		2,784
Accrued legal expenses		4,277		3,957
Other accrued liabilities		26,507		31,653
	$	38,134	$	51,919