CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
OPERATING ACTIVITIES
Net loss	$ (29,204)	$ (24,623)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,892	2,151
Stock-based compensation expense	13,525	8,419
Change in fair value of contingent consideration	0	2,562
Deferred income taxes	13	123
Accretion of discounts on marketable investment securities	(1,229)	0
Other	211	12
Change in operating assets and liabilities:
Accounts receivable	(4,383)	(2,725)
Prepaid expenses and other current assets	(654)	(357)
Inventory	(540)	(329)
Operating lease assets	331	222
Other assets	319	42
Accounts payable	3,896	187
Operating lease liabilities	(68)	(226)
Accrued compensation	(11,562)	(6,917)
Other accrued and current liabilities	1,014	29
Net cash used in operating activities	(25,439)	(21,430)
INVESTING ACTIVITIES
Purchases of property and equipment	(3,338)	(402)
Proceeds from sale of property and equipment	5	0
Purchases of marketable investment securities	(30,083)	0
Proceeds from maturities of marketable investment securities	50,000	0
Net cash provided by (used in) investing activities	16,584	(402)
FINANCING ACTIVITIES
Proceeds from exercise of common stock options	95	399
Payment of employees’ taxes on vested restricted stock units	(314)	(56)
Proceeds from contributions to the employee stock purchase plan	982	897
Repayment of principal portion of finance lease liabilities	(35)	(24)
Net cash provided by financing activities	728	1,216
NET CHANGE IN CASH AND CASH EQUIVALENTS	(8,127)	(20,616)
Beginning of period	122,948	329,633
End of period	114,821	309,017
DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Accrued purchases of property and equipment	2,730	32
Deferred acquisition costs	0	1,026
Property and equipment acquired with tenant improvement allowance	$ 89	$ 0