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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities: |  |  |
Net loss | $ (15,213) | $ (24,407) | $ (31,790)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 21,826 | 29,959 | 39,235
Operating lease cost | 1,201 |  |
Non-cash compensation | 1,206 | 1,368 | 976
Deferred income tax (benefit) expense | (23) | (757) | 763
Change in other accrued long-term liabilities |  |  | (1,489)
(Gain) loss on disposal of assets | (86) | 16 | (1,714)
Remeasurement and other | (139) |  | (91)
Change in operating assets and liabilities: |  |  |
Decrease (increase) in accounts receivable | 1,118 | 6,744 | (16,465)
Decrease (increase) in prepaid expenses and other current assets | 6,983 | (2,664) | 278
(Decrease) increase in accounts payable | (579) | (798) | 1,207
Increase (decrease) in accrued liabilities | 1,356 | (777) | 1,458
Decrease in operating lease liabilities | (1,150) |  |
(Decrease) increase in deferred revenue | (7,020) | 4,187 | 929
Net cash provided by (used in) operating activities | 9,480 | 12,871 | (6,703)
Cash flows from investing activities: |  |  |
Capital expenditures, net of non-cash capital expenditures summarized below | (4,396) | (15,745) | (8,675)
Proceeds from maturity of short-term investments | 33,075 | 55,000 | 61,250
Acquisition of short-term investments | (24,842) | (49,000) | (37,583)
Proceeds from disposal of assets | 297 | 437 | 1,325
Proceeds from flood insurance claims |  | 687 | 375
Proceeds from notes receivable | 51 | 25 | 96
Net cash provided by (used in) investing activities | 4,185 | (8,596) | 16,788
Cash flows from financing activities: |  |  |
Proceeds from notes payable |  | 6,518 |
Principal payments on notes payable | (8,165) | (1,180) | (2,186)
Principal payments on finance leases | (2,855) | (2,699) | (1,076)
Tax withholdings related to stock-based compensation awards | (236) | (121) | (158)
Cash in lieu of stock dividend paid |  | (1) |
Net cash (used in) provided by financing activities | (11,256) | 2,517 | (3,420)
Effect of exchange rate changes on cash, cash equivalents and restricted cash | 133 | (76) | 724
Net increase in cash, cash equivalents and restricted cash | 2,542 | 6,716 | 7,389
Cash, cash equivalents and restricted cash at beginning of period | 28,729 | 22,013 | 14,624
Cash, cash equivalents and restricted cash at end of period | 31,271 | 28,729 | 22,013
Supplemental cash flow information: |  |  |
Cash paid for interest | 440 | 408 | 143
Cash paid for income taxes | 40 | 14 |
Cash received for income taxes | 55 |  | 4,791
Non-cash operating, investing and financing activities: |  |  |
(Decrease) increase in accrued purchases of property and equipment | (927) | 353 | (907)
Finance leases incurred | 121 |  | 8,542
Increase in right-of-use assets and operating lease liabilities | 8,252 |  |
Decrease in right-of-use assets for accrued rent | (497) |  |
Increase in right-of-use assets for prepaid rent | 14 |  |
Financed insurance premiums | $ 2,256 | $ 2,317 | 248
Equipment sales financed for buyer |  |  | (1,500)
Sales tax on equipment sales financed for buyer |  |  | $ (132)

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- Definition The amount of cash received during the period as refunds for the overpayment of taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 + Details
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- Definition Amount of cash inflow for proceeds from settlement of insurance claim, classified as investing activities. Excludes insurance settlement classified as operating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 21B -URI http://asc.fasb.org/extlink&oid=109223946&loc=SL94080549-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition The cash inflow from maturities, prepayments, calls and collections of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition The cash inflow from a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the proceeds from sale of notes receivable, as well as principal collections from a borrowing supported by a written promise to pay an obligation (note receivable). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591551-111686 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3000-108585 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4591552-111686 + Details
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- Definition Amount of increase in right-of-use asset obtained in exchange for finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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