Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (32,420)	$ (23,644)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and write-off of property and equipment	720	717
Amortization of acquired intangible assets	2,977	0
Amortization and write-off of other intangible assets	344	345
Amortization of lease right of use assets under operating leases	520	240
Amortization of net premiums (discounts) on marketable securities	0	(498)
Stock-based compensation	5,742	8,747
Impairment of lease right of use assets and leasehold improvements	574	0
Changes in operating assets and liabilities:
Trade accounts receivable	1,776	(950)
Other current assets	(600)	392
Other assets	(568)	(19)
Accounts payable and other accrued liabilities	(2,881)	1,859
Deferred revenue	(1,043)	(331)
Lease liability and other long-term liabilities	(808)	656
Net cash used in operating activities	(25,667)	(12,486)
Cash flows from investing activities:
Net cash paid for acquisition	(3,512)	0
Purchase of property and equipment	(716)	(569)
Capitalized patent costs	(271)	(290)
Proceeds from maturities of marketable securities	11,148	49,722
Purchases of marketable securities	(4,908)	(30,941)
Net cash provided by investing activities	1,741	17,922
Cash flows from financing activities:
Issuance of common stock, net of issuance costs	58,220	0
Purchase of common stock	(974)	(3,774)
Loan repayment	(17)	0
Net cash provided by (used in) financing activities	57,229	(3,774)
Effect of exchange rate on cash	(41)	0
Net increase in cash and cash equivalents	33,262	1,662
Cash and cash equivalents at beginning of period	13,789	19,696
Cash and cash equivalents at end of period	47,051	21,358
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net	(14)	(31)
Supplemental schedule of non-cash activities:
Property and equipment and patent costs in accounts payable	4	(67)
Stock-based compensation capitalized to software and patent costs	80	74
Common stock issued for acquisition	31,519	0
Warrants issued for acquisition	1,601	0
Right of use assets obtained in exchange for lease obligations	$ 5,176	$ 0