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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 21,124 | $ 25,764
Unbilled revenue receivable | 5 | 13
Receivable from related party | 21 | 17
Prepaid expenses and other assets | 1,897 | 1,844
Total current assets | 23,047 | 27,638
Property and equipment, net | 1,275 | 1,317
Other noncurrent assets | 32 | 32
Total assets | 24,354 | 28,987
Current liabilities: |  |
Current portion of long-term debt | 776 | 0
Accounts payable | 974 | 1,049
Accrued expenses and other current liabilities | 1,265 | 1,273
Current portion of deferred revenue | 0 | 1,034
Total current liabilities | 3,015 | 3,356
Long-term debt, net | 4,103 | 4,855
Common stock warrant liability | 651 | 523
Other noncurrent liabilities | 277 | 278
Total liabilities | 8,046 | 9,012
Stockholders’ equity: |  |
Common stock, $0.0001 par value per share; 200,000,000 shares authorized, 39,454,821 issued and outstanding, March 31, 2018; 39,300,823 shares issued and outstanding, December 31, 2017 | 4 | 4
Additional paid-in capital | 54,394 | 53,586
Accumulated deficit | (38,090) | (33,615)
Total stockholders' equity | 16,308 | 19,975
Total liabilities and stockholders’ equity | $ 24,354 | $ 28,987

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- Definition Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19-26) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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