Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 57,732	$ 164,164
Marketable investments	74,047	0
Accounts receivable, net of allowance for credit losses of $1,093 and $899, respectively	33,169	31,449
Inventories	51,680	39,503
Other current assets and prepaid expenses	20,156	14,545
Total current assets	236,784	249,661
Property and equipment, net	3,009	3,019
Deferred tax asset	737	778
Operating lease right-of-use assets	14,330	14,627
Goodwill	1,339	1,339
Other long-term assets	9,792	10,169
Restricted cash	700	700
Total assets	266,691	280,293
Current liabilities:
Accounts payable	13,646	7,891
Accrued liabilities	48,044	54,100
Operating lease liabilities	2,628	2,419
Deferred revenue	9,719	9,490
Total current liabilities	74,037	73,900
Deferred revenue, net of current portion	1,345	1,335
Operating lease liabilities, net of current portion	13,007	13,483
Convertible notes, net of unamortized debt issuance costs of $3,788 and $4,007, respectively	134,462	134,243
Other long-term liabilities	680	763
Total liabilities	223,531	223,724
Commitments and Contingencies (Note 12)
Stockholders’ equity:
Common stock, $0.001 par value; authorized: 50,000,000 shares; issued and outstanding: 18,132,949 and 17,995,344 shares at March 31, 2022 and December 31, 2021, respectively	18	18
Additional paid-in capital	116,468	114,724
Accumulated other comprehensive loss	(11)	0
Accumulated deficit	(73,315)	(58,173)
Total stockholders’ equity	43,160	56,569
Total liabilities and stockholders’ equity	$ 266,691	$ 280,293