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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities: |  |
Net loss | $ (13,196) | $ (15,213)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |
Depreciation and amortization | 17,174 | 21,826
Operating lease cost | 1,186 | 1,201
Non-cash compensation | 703 | 1,206
Deferred income tax expense (benefit) | 10 | (23)
Bad debt expense | 1,625 |
Change in other accrued long-term liabilities | (150) |
Gain on disposal of assets | (240) | (86)
Remeasurement and other | 266 | (139)
Change in operating assets and liabilities: |  |
Decrease in accounts receivable | 16,866 | 1,118
Decrease in prepaid expenses and other assets | 3,301 | 6,983
Decrease in accounts payable | (2,276) | (579)
(Decrease) increase in accrued liabilities | (2,722) | 1,356
Decrease in operating lease liabilities | (1,204) | (1,150)
Decrease in deferred revenue | (1,702) | (7,020)
Net cash provided by operating activities | 19,641 | 9,480
Cash flows from investing activities: |  |
Capital expenditures, net of non-cash capital expenditures summarized below | (2,847) | (4,396)
Proceeds from maturity of short-term investments | 2,350 | 33,075
Acquisition of short-term investments | (583) | (24,842)
Proceeds from disposal of assets | 542 | 297
Proceeds from notes receivable | 26 | 51
Net cash (used in) provided by investing activities | (512) | 4,185
Cash flows from financing activities: |  |
Proceeds from notes payable | 6,374 |
Principal payments on notes payable | (8,512) | (8,165)
Principal payments on finance leases | (2,326) | (2,855)
Tax withholdings related to stock-based compensation awards | (70) | (236)
Net cash used in financing activities | (4,534) | (11,256)
Effect of exchange rate changes on cash and cash equivalents and restricted cash | 89 | 133
Net increase in cash and cash equivalents and restricted cash | 14,684 | 2,542
Cash and cash equivalents and restricted cash at beginning of period | 31,271 | 28,729
Cash and cash equivalents and restricted cash at end of period | 45,955 | 31,271
Supplemental cash flow information: |  |
Cash paid for interest | 92 | 440
Cash paid for income taxes | 87 | 40
Cash received for income taxes | 402 | 55
Non-cash operating, investing and financing activities: |  |
Decrease in accrued purchases of property and equipment | (61) | (927)
Finance leases incurred |  | 121
Increase in right-of-use assets and operating lease liabilities | 64 | 8,252
Decrease in right-of-use assets for accrued rent |  | (497)
Increase in right-of-use assets for prepaid rent | 3 | 14
Financed insurance premiums | $ 434 | $ 2,256

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