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v3.21.1

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Operating activities |  |
Net income (loss) | $ 891 | $ (12,595)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |
Depreciation and amortization | 1,106 | 1,014
Amortization of right-of-use assets | 653 | 634
Gain on disposal of property and equipment and from lease termination |  | (76)
Amortization of premium (accretion of discounts) on marketable securities | 221 | (87)
Change in fair value of warrant liability | 25,552 | (8,610)
Stock compensation expense | 4,723 | 1,778
Cost of sales - amortization of intangible assets |  | 2,298
Non-cash interest expense | 414 | 1,338
Tenant improvements provided by the landlord |  | 908
Changes in operating assets and liabilities: |  |
Accounts and other receivables, net | (61,333) | 751
Inventories, net | (5,157) | (6,767)
Prepaid manufacturing | 3,219 |
Prepaid expenses and other current assets | (171) | (1,000)
Other assets | (95) | 43
Accounts payable | (295) | (2,095)
Lease liabilities | (751) | (672)
Deferred revenue | 78,340 |
Accrued liabilities and other liabilities | (2,847) | (3,728)
Net cash provided by (used in) operating activities | 38,032 | (26,866)
Investing activities |  |
Acquisition of technology licenses |  | (7,000)
Purchases of marketable securities | (72,016) | (17,985)
Proceeds from maturities and redemptions of marketable securities | 51,130 | 37,900
Purchases of property and equipment, net | (1,747) | (2,352)
Net cash (used in) provided by investing activities | (22,633) | 10,563
Financing activities |  |
Proceeds from issuance of common stock, net | 28,156 | 14,229
Proceeds from exercise of warrants | 3,377 |
Proceeds (tax withholding) from exercise of stock options and restricted stock awards, net | 387 | (1)
Proceeds from Employee Stock Purchase Plan | 383 | 311
Net cash provided by financing activities | 32,303 | 14,539
Effect of exchange rate changes on cash, cash equivalents and restricted cash | (731) | (225)
Net increase (decrease) in cash, cash equivalents and restricted cash | 46,971 | (1,989)
Cash, cash equivalents and restricted cash at beginning of period | 32,310 | 40,100
Cash, cash equivalents and restricted cash at end of period | 79,281 | 38,111
Supplemental disclosure of cash flow information |  |
Cash paid during the period for interest | 4,296 | 3,412
Non-cash investing and financing activities: |  |
Purchases of property and equipment, not yet paid | $ 411 | $ 408

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