Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 162,486	$ 47,047
Accounts receivable, net of allowance for credit losses of $1,227 and $1,598, respectively	30,760	21,962
Inventories	35,493	28,508
Other current assets and prepaid expenses	13,350	8,779
Total current assets	242,089	106,296
Property and equipment, net	2,205	2,299
Deferred tax asset	589	643
Operating lease right-of-use assets	15,269	17,076
Goodwill	1,339	1,339
Other long-term assets	6,955	5,080
Total assets	268,446	132,733
Current liabilities:
Accounts payable	7,259	6,684
Accrued liabilities	44,295	32,295
Operating lease liabilities	2,394	2,260
PPP loan payable	0	3,630
Deferred revenue	9,188	9,489
Total current liabilities	63,136	54,358
Deferred revenue, net of current portion	1,492	1,748
Operating lease liabilities, net of current portion	14,117	15,950
PPP loan payable, net of current portion	0	3,555
Convertible notes, net of unamortized debt issuance costs of $4,225	134,025	0
Other long-term liabilities	333	242
Total liabilities	213,103	75,853
Commitments and Contingencies (Notes 12)
Stockholders’ equity:
Common stock, $0.001 par value; authorized: 50,000,000 shares; issued and outstanding: 17,951,534 and 17,679,232 shares at September 30, 2021 and December 31, 2020, respectively	18	18
Additional paid-in capital	109,563	117,097
Accumulated deficit	(54,238)	(60,235)
Total stockholders’ equity	55,343	56,880
Total liabilities and stockholders’ equity	$ 268,446	$ 132,733