Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 148,480	$ 231,561
Restricted cash	231	231
Short-term marketable securities	31,561	0
Accounts receivable, net	6,562	4,228
Inventory	16,285	10,741
Prepaid expenses and other current assets	4,883	3,228
Total current assets	208,002	249,989
Long-term marketable securities	10,941	0
Property and equipment, net	4,814	1,474
Goodwill	2,333	2,333
Intangible assets, net	277	400
Right of use assets	8,075	8,976
Other long-term assets	731	536
Total assets	235,173	263,708
Current liabilities
Accounts payable	1,582	1,472
Accrued liabilities	13,366	8,651
Income taxes payable	147	94
Deferred revenue	163	71
Credit Agreement, current	91	0
Current lease liabilities	2,201	2,238
Total current liabilities	17,550	12,526
Deferred tax liability	37	62
Long-term lease liabilities	6,844	7,618
Credit agreement	455	564
Term loan	16,869	16,804
Other long-term liabilities	179	0
Total liabilities	41,934	37,574
Commitments and contingencies (Note 8)
Stockholders’ Equity
Preferred stock, $0.001 par value, 10,000,000 shares authorized; no shares issued and outstanding as of December 31, 2021 and December 31, 2020	0	0
Common stock, $0.001 par value, 200,000,000 shares authorized; 36,931,762 shares and 35,693,753 shares issued and outstanding as of December 31, 2021 and December 31, 2020, respectively	37	36
Additional paid-in capital	482,885	467,147
Accumulated other comprehensive income	1,712	1,685
Accumulated deficit	(291,395)	(242,734)
Total stockholders’ equity	193,239	226,134
Total liabilities and stockholders’ equity	$ 235,173	$ 263,708