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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Cash flows from operating activities: |  |
Net loss | $ (2,974) | $ (1,258)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Depreciation and amortization | 417 | 919
Bad debt expense | 14 |
Bad debt (recovery) |  | (14)
Amortization of deferred financing costs | 0 | 36
Amortization of debt discount, net of gain on extinguishment | 104 | 0
Stock-based compensation | 159 | 280
Impairment charges | 2,175 | 5
Deferred tax provision | 0 | 54
Changes in assets and liabilities: |  |
Accounts receivable | (268) | (47)
Prepaid expenses and other current assets | 168 | 42
Accounts payable | (34) | 36
Accrued expenses and other liabilities | (395) | 18
Accrued sales taxes and regulatory fees | (55) | (42)
Net cash provided by (used in) operating activities | (689) | 29
Cash flows from investing activities: |  |
Purchases of property and equipment | (222) | (60)
Net cash used in investing activities | (222) | (60)
Cash flows from financing activities: |  |
Principal payments under borrowing arrangements | (1,832) | 0
Proceeds from Series C Preferred Stock issuance, net of expenses of $223 | 1,527 | 0
Purchase of treasury stock | (52) | (12)
Net cash used in financing activities | (357) | (12)
Decrease in cash and cash equivalents | (1,268) | (43)
Cash at beginning of period | 3,946 | 1,140
Cash at end of period | 2,678 | 1,097
Supplemental disclosures of cash flow information: |  |
Cash paid during the period for interest | 318 | 542
Non-cash investing and financing activities: |  |
Accrued preferred stock dividends | $ 6 | $ 6

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