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Consolidated Balance Sheets - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Current assets: |  |
Cash | $ 2,184 | $ 1,063
Accounts receivable, net of allowance for doubtful accounts of $153 and $720, respectively | 6,075 | 7,940
Unbilled receivables - current | 3,018 | 4,547
Inventories | 364 | 393
Prepaid and other assets | 2,822 | 3,281
Current assets related to discontinued operations | 94 | 89
Total current assets | 14,557 | 17,313
Property and equipment: |  |
Buildings and land | 19,782 | 23,806
Equipment | 17,805 | 33,182
Vehicles | 364 | 393
Leasehold improvements | 119 | 11,549
Office furniture and equipment | 1,576 | 1,670
Construction-in-progress | 1,270 | 653
Total property and equipment | 40,916 | 71,253
Less accumulated depreciation | (25,842) | (56,383)
Net property and equipment | 15,074 | 14,870
Property and equipment related to discontinued operations | 81 | 81
Intangibles and other long term assets: |  |
Permits | 8,393 | 8,419
Other intangible assets - net | 1,382 | 1,487
Unbilled receivables - non-current | 129 | 184
Finite risk sinking fund | 15,807 | 15,676
Other assets | 1,215 | 1,313
Other assets related to discontinued operations | 157 | 195
Total assets | 56,795 | 59,538
Current liabilities: |  |
Accounts payable | 5,061 | 3,537
Accrued expenses | 4,269 | 4,782
Disposal/transportation accrual | 1,449 | 2,071
Deferred revenue | 4,472 | 4,311
Accrued closure costs - current | 924 | 2,791
Current portion of long-term debt | 1,244 | 1,184
Current liabilities related to discontinued operations | 512 | 905
Total current liabilities | 17,931 | 19,581
Accrued closure costs | 5,560 | 5,604
Other long-term liabilities | 208 | 1,191
Deferred tax liabilities | 1,730 | 1,694
Long-term debt, less current portion | 2,207 | 2,663
Long-term liabilities related to discontinued operations | 795 | 359
Total long-term liabilities | 10,500 | 11,511
Total liabilities | 28,431 | 31,092
Commitments and Contingencies (Note 9) |  |
Series B Preferred Stock of subsidiary, $0 par value; 1,467,396 shares authorized; 0 and 1,284,730 shares issued, respectively; 0 and 1,284,730 shares outstanding, respectively; liquidation value of $1.00 per share plus accrued and unpaid dividends of $0 and $995, respectively (Note 13) |  | 1,285
Stockholders' Equity: |  |
Preferred Stock, $.001 par value; 2,000,000 shares authorized, no shares issued and outstanding |  |
Common Stock, $.001 par value; 30,000,000 shares authorized; 11,915,184 and 11,738,623 shares issued, respectively; 11,907,542 and 11,730,981 shares outstanding, respectively | 12 | 12
Additional paid-in capital | 107,317 | 106,417
Accumulated deficit | (77,465) | (77,893)
Accumulated other comprehensive loss | (169) | (112)
Less Common Stock in treasury, at cost; 7,642 shares | (88) | (88)
Total Perma-Fix Environmental Services, Inc. stockholders' equity | 29,607 | 28,336
Non-controlling interest | (1,243) | (1,175)
Total stockholders' equity | 28,364 | 27,161
Total liabilities and stockholders' equity | $ 56,795 | $ 59,538

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