Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities
Net loss	$ (62,745)	$ (53,908)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,050	2,071
Amortization of right-of-use asset	195	196
Stock-based compensation expense	7,479	7,909
Change in fair value of warrant liability	(14,117)
Net amortization of premiums and discounts on marketable securities	122	(49)
Amortization of debt-discount and accretion of deferred debt costs	521	196
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(1,813)	(576)
Accounts receivable	7	19,998
Contract assets	(1,308)	(2,152)
Other long-term assets	(694)	(461)
Accounts payable	334	104
Accrued expenses	1,048	70
Deferred revenue	(7,111)	(2,983)
Proceeds for tenant improvement incentive from landlord		2,035
Operating lease asset and liabilities	(539)	110
Net cash used in operating activities	(76,571)	(27,440)
Investing activities
Purchases of property and equipment	(1,000)	(3,307)
Purchases of marketable securities	(51,408)
Maturities of marketable securities		50,000
Net cash (used in) provided by investing activities	(52,408)	46,693
Financing activities
Payments on financing lease obligations	(196)	(179)
Proceeds from issuance of common stock through employee benefit plans	157	509
Proceeds from the issuance of common stock through employee stock purchase plan	153	223
Proceeds from issuance of common stock through at-the-market sales agreement, net of issuance costs		11,896
Proceeds from term loan, net of issuance costs		19,700
Proceeds from issuance of common stock in public offering, net of issuance costs	70,337
Payment of issuance cost related to out of period offering	(36)
Net cash provided by financing activities	70,415	32,149
Net increase (decrease) in cash, cash equivalents and restricted cash	(58,564)	51,402
Cash and cash equivalents, Beginning of period	177,070	44,817
Cash and cash equivalents, End of period	118,506	96,219
Supplemental disclosure of cash flow information:
Cash paid for interest	2,380	1,055
Cash paid for tax		7
Non-cash investing and financing activities:
Property and equipment received but unpaid as of period end	178	139
Offering costs incurred but unpaid as of period end	$ 10	$ 103