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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities: |  |
Net income | $ 5,807,000 | $ (1,775,000)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities: |  |
Depreciation and amortization | 6,171,000 | 6,286,000
Noncash operating lease expense | 4,033,000 | 3,799,000
Impairment of goodwill | 0 | 4,359,000
Provision for doubtful accounts | 100,000 | 95,000
Stock-based compensation expense | 1,068,000 | 1,766,000
Loss on debt extinguishment | 0 | 513,000
Amortization of debt discount and issuance costs | 2,157,000 | 1,392,000
Deferred tax benefit | (1,301,000) | (609,000)
Change in fair value of warrant liability | 1,634,000 | (588,000)
Gain on embedded derivative | 0 | (388,000)
Gain on sale of property and equipment | (95,000) | (57,000)
Changes in operating assets and liabilities: |  |
Accounts receivable | 19,200,000 | 659,000
Contract assets | 10,090,000 | (13,378,000)
Other current assets | (115,000) | 30,139,000
Accounts payable, including retainage | (19,504,000) | 11,914,000
Contract liabilities | 4,278,000 | (6,446,000)
Prepaid income taxes | 494,000 | 58,000
Accrued taxes payable | 1,659,000 | 12,000
Accrued expenses and other current liabilities | 4,713,000 | (34,686,000)
Operating lease liabilities | (4,337,000) | (3,654,000)
Other long-term liabilities | 3,763,000 | (337,000)
Net cash provided by (used in) operating activities | 39,815,000 | (926,000)
Cash flows from investing activities: |  |
Proceeds from sale of property and equipment | 162,000 | 168,000
Advances to joint ventures | (2,000) | 4,000
Purchase of property and equipment | (1,483,000) | (2,663,000)
Net cash used in investing activities | (1,323,000) | (2,491,000)
Cash flows from financing activities: |  |
Bank overdrafts | 0 | (1,333,000)
Payments on Credit Agreement term loan | 0 | (14,335,000)
Proceeds from Credit Agreement revolver | 0 | 17,500,000
Payments on Credit Agreement revolver | 0 | (17,500,000)
Proceeds from 2019 Revolving Credit Facility | 7,250,000 | 32,500,000
Payments on 2019 Revolving Credit Facility | (7,250,000) | (32,500,000)
Proceeds from 2019 Refinancing Term Loan, net of debt discount | 0 | 38,644,000
Payments on 2019 Refinancing Term Loan | (2,000,000) | 0
Warrants issued in conjunction with the 2019 Refinancing Term Loan | 0 | 969,000
Embedded derivative associated with the 2019 Refinancing Term Loan | 0 | 388,000
Payments on Bridge Term Loan | 0 | (7,736,000)
Payments on finance leases | (2,664,000) | (2,547,000)
Proceeds from contributions to employee stock purchase plan | 191,000 | 0
Taxes paid related to net-share settlement of equity awards | (216,000) | (131,000)
Payments of debt issuance costs | 0 | (3,777,000)
Net cash provided by (used in) financing activities | (4,689,000) | 10,142,000
Increase in cash, cash equivalents and restricted cash | 33,803,000 | 6,725,000
Cash, cash equivalents and restricted cash, beginning of year | 8,457,000 | 1,732,000
Cash, cash equivalents and restricted cash, end of year | 42,260,000 | 8,457,000
Noncash investing and financing transactions: |  |
Debt issuance costs related to 2019 Refinancing Agreement paid-in-kind | 0 | 1,000,000
Right of use assets obtained in exchange for new operating lease liabilities | 1,096,000 | 3,355,000
Right of use assets obtained in exchange for new finance lease liabilities | 2,624,000 | 3,578,000
Right of use assets disposed or adjusted modifying operating leases liabilities | 621,000 | 1,651,000
Right of use assets disposed or adjusted modifying finance leases liabilities | (86,000) | (78,000)
Interest paid | $ 6,467,000 | $ 4,607,000

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