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Redeemable Convertible Preferred Stock (Details) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2014 USD ($) shares | Nov. 30, 2013 USD ($) shares | May 31, 2013 USD ($) shares | Nov. 30, 2012 USD ($) shares | Jan. 31, 2012 USD ($) shares | Dec. 31, 2016 $ / shares | Dec. 31, 2014 shares | Dec. 31, 2013 USD ($) shares | Dec. 31, 2011 USD ($) shares
Series C Redeemable Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Convertible promissory bridge notes and accrued interest payable |  |  |  |  |  |  |  | $ 4,900 |
Preferred Stock [Member] | Series B Redeemable Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  |  |  | 1,701,909 |  |  |  |
Proceeds from issuance of stock |  |  |  |  | $ 10,400 |  |  |  |
Issuance costs |  |  |  |  | $ 22 |  |  |  |
Preferred stock dividend rate, (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.49 |  |  |
Preferred Stock [Member] | Series B-1 Redeemable Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock dividend rate, (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.49 |  |  |
Preferred Stock [Member] | Series C Redeemable Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  |  |  |  |  |  | 1,918,048 |
Proceeds from issuance of stock |  |  |  |  |  |  |  | $ 19,700 |
Issuance costs |  |  |  |  |  |  |  | $ 82 |
Preferred stock dividend rate (as a percent) |  |  |  |  |  | 8.00% |  |  |
Preferred Stock [Member] | Series B-2 Redeemable Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock dividend rate, (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.49 |  |  |
Preferred Stock [Member] | Redeemable Convertible Preferred Stock, Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  |  |  | 169,054 |  |  |  | 2,652,110
Proceeds from issuance of stock |  |  |  |  | $ 1,000 |  |  |  | $ 16,000
Issuance costs |  |  |  |  | $ 24 |  |  |  | $ 199
Preferred stock dividend rate, (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.49 |  |  |
EPM Live [Member] | Preferred Stock [Member] | Series B-1 Redeemable Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Numbers of share issued in acquisition (in shares) | shares |  |  |  | 131,168 |  |  |  |  |
Value of shares issued in acquisition |  |  |  | $ 800 |  |  |  |  |
Preferred stock vesting period (in months) |  |  |  | 24 months |  |  |  |  |
FileBound [Member] | Preferred Stock [Member] | Series B-1 Redeemable Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Numbers of share issued in acquisition (in shares) | shares |  |  | 106,572 |  |  |  |  |  |
Value of shares issued in acquisition |  |  | $ 624 |  |  |  |  |  |
ComSci [Member] | Preferred Stock [Member] | Series B-2 Redeemable Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Numbers of share issued in acquisition (in shares) | shares |  | 155,598 |  |  |  |  |  |  |
Value of shares issued in acquisition |  | $ 949 |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |
Issuance costs | $ 4,100 |  |  |  |  |  |  |  |
Issuance of common stock upon conversion of preferred stock (in shares) | shares | 6,834,476 |  |  |  |  |  | 6,834,476 |  |
Conversion ratio for shares of preferred stock | 1 |  |  |  |  |  |  |  |

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