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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 35,724 | $ 24,294
Restricted cash | 6,000 | 6,000
Investments | 60,786 | 92,311
Accounts receivable, net of allowance for doubtful accounts of $1,092 and $1,117, respectively | 16,944 | 15,321
Inventory | 13,861 | 11,982
Prepaid expenses and other | 1,706 | 1,045
Total current assets | 135,021 | 150,953
Property and equipment, net | 14,887 | 8,039
Operating lease right-of-use assets | 3,133 |
Finance lease right-of-use assets | 87 |
Intangible assets | 1,515 | 1,181
Total assets | 154,643 | 160,173
Current liabilities: |  |
Accounts payable and accrued expenses | 19,130 | 12,998
Current maturities of long term obligations | 1,736 | 28
Contract liabilities, current | 14 | 18
Total current liabilities | 20,880 | 13,044
Long Term Obligations, net of current maturities | 1,595 | 35
Other long-term liabilities |  | 70
Contract liabilities | 15 | 42
Total liabilities | 22,490 | 13,191
Commitments and contingencies - see Note 14 |  |
Shareholders' equity: |  |
Common stock, $0.01 par value per share; 100,000,000 shares authorized; 39,589,755 and 38,900,875 shares issued and outstanding | 396 | 389
Additional paid-in capital | 311,618 | 297,319
Accumulated deficit | (179,861) | (150,726)
Total shareholders' equity | 132,153 | 146,982
Total liabilities and shareholders' equity | $ 154,643 | $ 160,173

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