Acquisitions - Additional Information - Columbia Tanks Acquisition (Detail) - Columbia Tanks [Member] $ in Thousands	Mar. 12, 2015 USD ($) ft²
Business Acquisition [Line Items]
Square feet of manufacturing space \| ft²	99,000
Annual rent	$ 240
Annual rental payment for second year	270
Annual rental payment for third year	$ 300
Lease termination date	Sep. 30, 2016
Total purchase consideration	$ 1,214
Risk rate of non-interest bearing debt	4.00%
Inventory Note [Member]
Business Acquisition [Line Items]
Debt instrument, face amount	$ 450
Debenture, maturity date	Aug. 31, 2016
Notes Payable, Fair Value Disclosure	$ 436
Equipment [Member]
Business Acquisition [Line Items]
Debt instrument, face amount	$ 390
Debenture, maturity date	May 31, 2016
Notes Payable, Fair Value Disclosure	$ 378

Annual payment of lease.

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Square footage of assembly and manufacturing space.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Face (par) amount of debt instrument at time of issuance.

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

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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

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Fair value portion of notes payable.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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