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Income Taxes - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015	Jun. 30, 2016 USD ($)	Jun. 30, 2015	Apr. 01, 2016 EUR (€)	Dec. 31, 2015 USD ($)
Income Taxes [Line Items]
Effective tax rate	27.90%	17.00%	30.50%	23.50%
U.S. statutory tax rate	34.00%	34.00%	34.00%	34.00%
Atoll GmbH
Income Taxes [Line Items]
Business combination, intangible assets | €					€ 6,640,000
Deferred tax liabilities, intangible assets	$ 2,190,000		$ 2,190,000		1,972,000
Deferred tax assets, net operating losses | €					2,669,000
Deferred tax assets, intangible assets	$ 880,000		$ 880,000		€ 793,000
Latest Tax Year
Income Taxes [Line Items]
Net operating loss and business tax credit carry forwards expiration date			At various dates through December 2035.
Available to Reduce Future Federal Income Taxes
Income Taxes [Line Items]
Net operating loss carry forwards | $						$ 46,984,000
Business tax credit carry forwards | $						$ 1,920,000

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