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Subsequent Events - Additional Information (Details) - Revolving Credit Facility - Silicon Valley Bank - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2018 | Dec. 31, 2017
Subsequent Event [Line Items] |  |
Line of credit facility allowable amount |  | $ 3,000,000
Liquidity ratio |  | 125.00%
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Line of credit facility allowable amount | $ 10,000,000 |
Line of credit facility borrowing base limitation percentage of eligible receivables | 80.00% |
Liquidity ratio | 125.00% |
Interest expense borrowings | $ 3,000 |
Line of credit facility frequency of payments on monthly installments | Borrowings outstanding under the term loan under the amended and restated loan and security agreement will continue to be repaid in equal monthly installments of interest and principal and matures on December 1, 2018. |
Line of credit facility maturity date | Jan. 31, 2020 |
Subsequent Event | The Wall Street Journal Prime Rate |  |
Subsequent Event [Line Items] |  |
Basis spread on variable interest rate | 1.00% |
Line of credit facility interest rate description | The Company will be required to pay interest on borrowings outstanding, if any, under the revolving line of credit at a floating rate per annum equal to 1% above the Wall Street Journal prime rate (or, if unavailable, the Silicon Valley Bank prime rate) on a monthly basis, so long as the Company maintains a liquidity ratio of cash and cash equivalents plus accounts receivable to outstanding debt under the Amended Loan Agreement minus deferred revenue of 1.50 to 1.00. If this liquidity ratio is not met, the Company will be subject to a minimum interest charge of $3,000 per month and borrowings outstanding, if any, under the revolving line of credit will accrue interest at a floating rate per annum equal to 2% above the Wall Street Journal prime rate (or, if unavailable, the Silicon Valley Bank prime rate) prime rate on a monthly basis. |
Line of credit facility floating rate not met | 2.00% |
Subsequent Event | Prime Rate |  |
Subsequent Event [Line Items] |  |
Liquidity ratio | 150.00% |

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- Definition Line of credit facility borrowing base limitation percentage of eligible receivables. + References No definition available. + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + 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(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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