CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating activities:
Net loss	$ (4,358)	$ (10,461)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	1,793	1,508
Stock-based compensation	10,224	11,314
Accretion of discount or amortization of premium on investments	(766)	301
Amortization of debt issuance costs	400	403
Changes in operating assets and liabilities:
Accounts receivable	(10,970)	(3,084)
Inventory	(39,412)	(9,603)
Prepaid expenses and other assets	1,389	(2,142)
Accounts payable	14,650	(2,768)
Accrued compensation and employee related benefits	(2,006)	(1,775)
Accrued and other liabilities	4,472	1,242
Operating lease right-of-use assets	695	804
Operating lease liabilities	(891)	(1,008)
Deferred revenue	(1,780)	433
Net cash used in operating activities	(26,560)	(14,836)
Investing activities:
Purchases of investments		(67,085)
Proceeds from sales of investments	13,372
Proceeds from maturities of investments	34,136	20,000
Purchases of property and equipment	(7,582)	(3,050)
Net cash provided by (used in) investing activities	39,926	(50,135)
Financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	4,520	4,611
Net cash provided by financing activities	4,520	4,611
Net increase (decrease) in cash and cash equivalents	17,886	(60,360)
Cash and cash equivalents
Beginning of period	19,597	123,903
End of period	37,483	63,543
Supplemental disclosure of cashflow information:
Purchases of property and equipment not yet paid	$ 3,284	$ 508