Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Measurements

Schedule of classified liabilities measured at fair value on recurring basis

	Fair Value Measurement
	at Reporting Date Using
							Balance as of
	Level 1		Level 2		Level 3		June 30, 2019
Liabilities
Acquisition-related contingent consideration - short-term	$	—	$	—	$	8,540	$	8,540
Acquisition-related contingent consideration - long-term		—		—		10,200		10,200
	$	—	$	—	$	18,740	$	18,740

	Fair Value Measurement
	at Reporting Date Using
							Balance as of
	Level 1		Level 2		Level 3		December 31, 2018
Liabilities
Acquisition-related contingent consideration - short-term	$	—	$	—	$	43,397	$	43,397
Acquisition-related contingent consideration - long-term		—		—		7,800		7,800
	$	—	$	—	$	51,197	$	51,197

Schedule of reconciliation of liability measured at fair value on recurring basis using significant unobservable inputs (Level 3)

Balance at December 31, 2018	$	51,197
Acquisition date fair value of the DoseMe contingent consideration		8,720
Cash consideration paid		(44,792)
Adjustments to fair value measurement		3,006
Adjustment to reclassify amounts settled in cash (previously reflected in equity)		609
Balance at June 30, 2019	$	18,740

Schedule of carrying value and fair value of financial instruments

	Face Value		Carrying Value		Fair Value
1.75% Convertible Senior Subordinated Notes due 2026 (the "2026 Notes")	$	325,000	$	220,189	$	328,656