Commitments and Contingencies - Additional Information (Detail)			3 Months Ended		9 Months Ended	153 Months Ended
	Sep. 30, 2015 USD ($) Cases	Oct. 03, 2014 USD ($)	Sep. 30, 2015 USD ($) Cases	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Cases	Sep. 30, 2015 USD ($) Cases	Dec. 31, 2014 Cases
Commitments and Contingencies Disclosure [Abstract]
Cumulative settlement payments for cases involving asbestos-related claims	$ 500,000			$ 500,000		$ 800,000
Average cost per settled claim excluding legal fees	$ 25,000		$ 25,000		$ 25,000	$ 25,000
Number of claims pending | Cases	213		213		213	213	195
Number of new cases filed | Cases					36
Number of cases dismissed | Cases					18
Number of cases settled | Cases					0
Settlement recovering expense				$ 200,000
Loss amount awarded for damage		$ 600,000
Loss amount not paid under the contract		$ 200,000
Loss contingency settlement terms					After a trial on January 12, 2015, on February 27, 2015, the Court issued Findings of Fact and Conclusions of Law that provide that we and Kirk & Blum breached our contract with Viron and that Viron is entitled to damages in the amount of approximately $0.6 million plus attorneys' fees. Additionally, the Court concluded that we and Kirk & Blum are not entitled to an offset for the invoiced amounts of $0.2 million not paid by Viron under the contract.
Litigation amount recorded			$ 200,000
Assessment regarding Loss contingency impact Description					We are not aware of pending claims or assessments, other than as described above, which may have a material adverse impact on our liquidity, financial position, results of operations, or cash flows.