Segment Information - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Income (loss) from operations	$ 5,881	$ 5,551		$ 9,283	$ 32,045
Paragon Medical Inc
Segment Reporting Information [Line Items]
Sales revenue			$ 70,000
Income (loss) from operations			2,200
Bridgemedica, LLC
Segment Reporting Information [Line Items]
Sales revenue			7,300
Income (loss) from operations			$ 200