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Line of credit facility additional facility fee paid.

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Line of credit facility customary fees and expenses including facility fees payable.

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Line of credit facility early termination fee percentage.

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Line of credit facility liquidity covenant in cash.

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Monthly interest payable date.

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Non-formula line of credit maximum borrowing capacity.

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Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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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.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments including both interest and principal payments.

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Amount of the required periodic payments applied to interest.

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Amount of the required periodic payments applied to principal.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Description of the terms of a credit facility arrangement. Terms typically include interest rate, collateral required, guarantees required, repayment requirements, and restrictions on use of assets and activities of the entity.

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Date the credit facility terminates, in CCYY-MM-DD format.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Stated interest rate of the subordinated debt.

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Financial Liabilities - Additional Information (Detail) - USD ($)					3 Months Ended
	Feb. 21, 2018	Feb. 14, 2018	Dec. 28, 2017	Feb. 08, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Payment of debt instrument, aggregate principal amount					$ 10,952,000	$ 22,014,000
Debt instrument, outstanding prinicipal balance					$ 18,004,000		$ 13,736,000
Loss on extinguishment of debt						$ (977,000)
3VR
Debt Instrument [Line Items]
Date of acquisition completed		Feb. 14, 2018			Feb. 14, 2018
Business combination, issuance of notes		$ 2,000,000
Repayment of indebtedness outstanding of acquiree	$ 3,600,000
Term Loan
Debt Instrument [Line Items]
Debt instrument, outstanding prinicipal balance					$ 4,859,000		5,000,000
Term Loan \| Venture Lending & Leasing VII and VIII, Inc.
Debt Instrument [Line Items]
Loan maturity date					Aug. 08, 2020
Debt instrument, interest per annum rate				12.50%
Debt instrument scheduled interest accrued and payable				80.00%
Debt instrument, interest term				12 months
Payment of debt instrument, aggregate principal amount			$ 5,000,000
Debt instrument, outstanding prinicipal balance			10,000,000
Debt instrument payment, principal and interest			5,900,000
Debt instrument, outstanding principal			5,000,000
Debt instrument, accrued and unpaid interest outstanding			900,000
Loss on extinguishment of debt			$ 1,800,000
Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, outstanding prinicipal balance					$ 11,145,000		$ 8,736,000
Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Line of credit facility liquidity covenant in cash				$ 4,000,000
Notes Payable
Debt Instrument [Line Items]
Debt instrument, outstanding prinicipal balance					2,000,000
Notes Payable \| 3VR
Debt Instrument [Line Items]
Business combination, issuance of notes					$ 2,000,000
Annual interest rate of notes					3.00%
Notes payable, description					The Company issued subordinated unsecured promissory notes (“notes payable”) in the aggregate principal amount of $2.0 million, with an annual interest rate of 3.0%, payable on the one year anniversary of the closing date.
Previous Lender
Debt Instrument [Line Items]
Warrants to purchase common stock cancelled					400,000
Loan and Security Agreements
Debt Instrument [Line Items]
Line of credit facility customary fees and expenses including facility fees					$ 120,000
Loan and Security Agreements \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity under non-formula line of credit				$ 3,000,000
Line of credit facility early termination fee percentage				1.00%
Interest payable monthly date					Mar. 01, 2017
Line of credit facility additional facility fees paid				$ 40,000
Loan and Security Agreements \| Revolving Credit Facility \| Prime Rate
Debt Instrument [Line Items]
Percentage of interest rate				1.00%
Loan facility payable date					Feb. 08, 2019
Loan and Security Agreements \| East West Bank \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity under credit facility				$ 16,000,000
Loan and Security Agreements \| Venture Lending & Leasing VII and VIII, Inc. \| Term Loan Facility
Debt Instrument [Line Items]
Borrowing capacity under credit facility				$ 10,000,000