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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Current assets: |  |
Cash and cash equivalents | $ 226,099 | $ 103,193
Accounts receivable | 250 | 523
Prepaid expenses | 8,265 | 8,913
Other current assets | 2,474 | 3,046
Total current assets | 237,088 | 115,675
Property, equipment, and software—net | 32,962 | 21,147
Intangible assets—net | 1,453 | 1,466
Other assets | 417 | 312
Total assets | 271,920 | 138,600
Current liabilities: |  |
Accounts payable | 2,882 | 2,218
Accrued expenses and other current liabilities | 5,809 | 3,421
Deferred revenue | 7,129 | 8,436
Total current liabilities | 15,820 | 14,075
Deferred revenue—noncurrent | 79,245 | 82,807
Deferred rent—noncurrent | 2,877 | 1,758
Total liabilities | 97,942 | 98,640
Commitments and contingencies (Note 5) |  |
Stockholders’ equity: |  |
Preferred stock |  |
Additional paid-in capital | 310,339 | 126,094
Accumulated deficit | (135,409) | (85,187)
Treasury stock | (952) | (952)
Total stockholders’ equity | 173,978 | 39,960
Total liabilities and stockholders’ equity | $ 271,920 | 138,600
Series A Convertible Preferred Stock |  |
Stockholders’ equity: |  |
Preferred stock |  | 3
Total stockholders’ equity |  | 3
Series B Convertible Preferred Stock |  |
Stockholders’ equity: |  |
Preferred stock |  | 2
Total stockholders’ equity |  | $ 2

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