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, 2020	Sep. 30, 2019
Operating activities
Net loss	$ (53,908)	$ (55,709)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,071	1,686
Amortization of financing right-of-use asset	196	138
Loss on disposal of fixed assets		14
Stock-based compensation expense	7,909	6,623
Net amortization of premiums and discounts on marketable securities	(49)	(751)
Amortization of debt-discount and accretion of deferred debt costs	196
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(576)	(827)
Accounts receivable	19,998
Contract assets	(2,152)
Other long-term assets	(461)	(2)
Accounts payable	104	92
Accrued expenses	70	(2,602)
Deferred revenue	(2,983)	(1,474)
Proceeds for tenant improvement incentive from landlord	2,035	2,218
Operating lease asset and liabilities	110	944
Net cash used in operating activities	(27,440)	(49,650)
Investing activities
Purchases of property and equipment	(3,307)	(4,481)
Purchases of marketable securities		(108,206)
Maturities of marketable securities	50,000	84,000
Net cash provided by (used in) investing activities	46,693	(28,687)
Financing activities
Payments on financing and capital lease obligations	(179)	(149)
Proceeds from issuance of common stock through employee benefit plans	509	51
Proceeds from the issuance of common stock through employee stock purchase plan	223
Proceeds from the issuance of common stock through exercise of warrants		2
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 and accompanying warrants in public offerings and private placements, net of issuance costs		60,359
Proceeds from issuance of convertible preferred stock and accompanying warrants in public offering, net of issuance costs		4,638
Net cash provided by financing activities	32,149	64,901
Increase (decrease) in cash, cash equivalents and restricted cash	51,402	(13,436)
Cash and cash equivalents, Beginning of period	44,817	50,814
Cash and cash equivalents, End of period	96,219	37,378
Supplemental disclosure of cash flow information:
Cash paid for interest	1,055	52
Cash paid for tax	7	29
Non-cash investing and financing activities:
Property and equipment received but unpaid as of period end	139	4,773
Assets acquired under financing lease		997
Offering costs incurred but unpaid as of period end	$ 103	$ 50