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Leases - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended
	Apr. 30, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Lessee Lease Description [Line Items]
Lease expiration date		Mar. 31, 2025
Payments for lease termination fee		$ 671,000
Contribution as credit against lease payments		$ 180,000
Payments towards leasehold improvements			$ 373,000
Letter of credit amount payable	$ 575,000
Reduction in letters of credit	$ 100,000
Mississauga, Canada [Member]
Lessee Lease Description [Line Items]
Lease expiration date		Nov. 30, 2021
Lease commencement period		November 2016
Lease term (in months)		60 months
Wichita, Kansas [Member]
Lessee Lease Description [Line Items]
Lease term (in months)		120 days
Letter of Credit | Certificates of Deposit | Other Assets
Lessee Lease Description [Line Items]
Letters of credit outstanding amount		$ 575,000		$ 575,000

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- Definition

Contribution as credit against lease payments.

+ References

No definition available.

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- Definition

Lease commencement period.

+ References

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- Definition

Payments for lease termination fee.

+ References

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- Definition

Amount of assets pledged to secure a debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

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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.

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- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

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- Definition

Amount of increase (decrease) of the credit facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Amount of cash outflow for the allowance granted to lessee and/or direct costs incurred by lessor used to prepare the leased premises for tenant's occupancy.

+ References

No definition available.

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