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Commitments and Contingencies - Additional Information (Detail) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
May 31, 2016 | Sep. 30, 2014 | Dec. 31, 2012 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Loss Contingencies [Line Items] |  |  |  |  |  |
Amount provided lessor with irrevocable letter of credit |  |  |  | $ 100,000 |  |
Rent expense under operating leases |  |  |  | $ 1,300,000 | $ 900,000 | $ 600,000
December 2012, Amended Facility Lease Agreement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Lease expiration date |  |  | Sep. 30, 2016 |  |  |
September 2014, Amended Facility Lease Agreement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Lease expiration date |  | Sep. 30, 2019 |  |  |  |
Lease improvement allowance maximum amount |  | $ 600,000 |  |  |  |
May 2016, Amended Facility Lease Agreement [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Lease expiration date | Sep. 30, 2021 |  |  |  |  |
Lease improvement allowance maximum amount | $ 400,000 |  |  |  |  |

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- Definition Allowance for lease improvement. + References No definition available. + Details
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- Definition Date which lease or group of leases is set to expire, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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- Definition Amount of expense related to estimated loss to be realized from lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Details
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- Details
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