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Interim Consolidated Financial Statements - Summary of Effect of Adopting ASC 606 In Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Accounts receivable, net | $ 38,552 | $ 70,023
Deferred commissions | 10,884 | 13,731
Prepaid expenses and other current assets | 13,292 | 18,942
Total current assets | 207,180 | 236,819
Other assets | 8,417 | 6,231
Total assets | 328,494 | 345,200
Deferred revenue | 128,435 | 145,207
Total current liabilities | 170,311 | 195,053
Total liabilities | 181,664 | 204,011
Retained earnings | 126,006 | 123,010
Total stockholders’ equity | 146,830 | 141,189
Total liabilities and stockholders’ equity | 328,494 | $ 345,200
ASC 606 [Member] | Amounts as if Previous Guidance in Effect [Member] |  |
Accounts receivable, net | 41,837 |
Deferred commissions | 10,284 |
Prepaid expenses and other current assets | 17,966 |
Total current assets | 214,539 |
Other assets | 7,855 |
Total assets | 335,291 |
Deferred revenue | 138,060 |
Total current liabilities | 179,936 |
Total liabilities | 191,289 |
Retained earnings | 123,178 |
Total stockholders’ equity | 144,002 |
Total liabilities and stockholders’ equity | $ 335,291 |

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