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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Cash flows from operating activities: |  |
Net loss | $ (50,160) | $ (23,597)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities: |  |
Depreciation and amortization | 15,069 | 6,946
Accretion of debt in interest expense | 5,035 | 3,206
Current expected credit losses | 992 | 912
Provision for obsolete inventory | 19 | 2,158
Stock-based compensation | 9,356 | 3,217
Loss on debt extinguishment | 11,916 | 8,123
Adjustment to contingent consideration liability | 0 | (2,310)
Deferred income tax | (12,522) | (4,372)
Changes in operating assets and liabilities, net of acquisition: |  |
Accounts receivable | 3,189 | 756
Inventories | (12,377) | (9,945)
Other current assets | (7,575) | 989
Other assets | (2,774) | 597
Accounts payable | 7,849 | (655)
Accrued salaries and benefits | (2,605) | 2,794
Accrued expenses | (7,418) | (627)
Customer deposits and deferred service revenue | (1,402) | (3,287)
Other long-term liabilities | (211) | 706
Net cash used in operating activities | (43,619) | (14,389)
Cash flows from investing activities: |  |
Settlement of working capital for acquisitions | 0 | 191
Cash paid for acquisition, net of cash acquired | (374,653) | 0
Capital expenditures | (928) | (692)
Capitalization of software costs | (5,471) | (6,369)
Net cash used in investing activities | (381,052) | (6,870)
Cash flows from financing activities: |  |
Principal payments of long-term debt | (4,004) | (471)
Payments for the extinguishment of notes payable | (183,618) | (66,250)
Proceeds from common stock issuance | 215,000 | 0
Payments for common stock issuance costs | (6,827) | 0
Proceeds from debt issuance, net of original issue discount | 441,385 | 120,000
Payments for debt issuance costs | (13,998) | (4,214)
Treasury stock acquired from employees upon vesting or forfeiture of restricted stock | (4,477) | (829)
Proceeds from exercise of stock options | 819 | 436
Net cash provided by financing activities | 444,280 | 48,672
Effect of exchange rate changes on cash and cash equivalents | (2) | 306
Net increase in cash and cash equivalents | 19,607 | 27,719
Cash and cash equivalents at beginning of period | 180,686 | 28,036
Cash and equivalents at end of period | 200,293 | 55,755
Supplemental non-cash investing and financing flow information: |  |
Interest | 6,337 | 1,339
Taxes, net of refunds | 0 | 184
Master development agreement with related party (refer to Note 1) | 813 | 0
Capitalized software recorded in accounts payable | 0 | 295
Capital expenditures in accounts payable | 88 | 347
Tax withholding in accrued salaries and benefits related to treasury stock acquired from employees | 451 | 0
Common stock issued for acquisition | 109,740 | 0
Acquisition consideration recorded in accounts payable | 121 | 0
Master development agreement expenditures with related party in accounts payable | $ 163 | $ 0

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