NATURE OF OPERATIONS AND BASIS OF PRESENTATION - Additional Information (Detail) $ in Thousands	3 Months Ended
Mar. 31, 2017 USD ($) Segments Subsidiaries Categories	Mar. 31, 2016 USD ($)
Business Description and Basis Of Presentation [Line Items]
Foreign Currency Transaction Gain (Loss), Unrealized \| $	$ 176	$ (64)
Number of Operating Segments \| Segments	2
Number of Subsidiaries In Operating Segments \| Subsidiaries	3
Number of Categories In Product Offerings \| Categories	2
Orbital Gas Systems Limited
Business Description and Basis Of Presentation [Line Items]
Capital Stock Acquired Percentage	100.00%

Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30690-110894

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64836518&loc=d3e30700-110894

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895

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