Equity-Based Compensation - Activity Related to Plans (Details) $ in Millions	1 Months Ended		6 Months Ended
	Mar. 31, 2019	Feb. 28, 2019 shares	Jun. 30, 2019 USD ($) plan shares
Equity compensation plans
Number of equity compensation plans | plan			3
Stock Options
Outstanding, beginning (in shares)			3,716,579
Granted (in shares)			694,283
Vested (in shares)			(2,025)
Expired or terminated (in shares)			(577,293)
Outstanding, ending (in shares)			3,831,544
Restricted Stock Units
Restricted Stock Units
Outstanding (in shares)			1,128,535
Granted (in shares)			1,103,260
Vested (in shares)			(378,454)
Expired or terminated (in shares)			(231,855)
Outstanding (in shares)			1,621,486
2019 Equity Incentive Plan
Stock Options
Outstanding, beginning (in shares)			0
Granted (in shares)			145,408
Vested (in shares)			0
Expired or terminated (in shares)			0
Outstanding, ending (in shares)			145,408
2019 Equity Incentive Plan | Restricted Stock Units
Restricted Stock Units
Outstanding (in shares)			0
Granted (in shares)			64,928
Vested (in shares)			0
Expired or terminated (in shares)			0
Outstanding (in shares)			64,928
2007 Equity Plan
Stock Options
Outstanding, beginning (in shares)			2,781,786
Granted (in shares)			465,009
Vested (in shares)			(2,025)
Expired or terminated (in shares)			(482,768)
Outstanding, ending (in shares)			2,762,002
2007 Equity Plan | Restricted Stock Units
Restricted Stock Units
Outstanding (in shares)			1,041,141
Granted (in shares)			1,023,847
Vested (in shares)			(348,845)
Expired or terminated (in shares)			(231,855)
Outstanding (in shares)			1,484,288
2007 Equity Plan | Performance Restricted Stock Units (RSUs)
Restricted Stock Units
Granted (in shares)		365,591
Award vesting period	3 years
Maximum shares that may be issued (in shares)			347,591
Fair value, performance- based RSUs | $			$ 4.5
Compensation expense, period for recognition			3 years
2013 Lumara Equity Plan
Stock Options
Outstanding, beginning (in shares)			124,450
Granted (in shares)			34,700
Vested (in shares)			0
Expired or terminated (in shares)			(26,275)
Outstanding, ending (in shares)			132,875
2013 Lumara Equity Plan | Restricted Stock Units
Restricted Stock Units
Outstanding (in shares)			2,101
Granted (in shares)			1,100
Vested (in shares)			(533)
Expired or terminated (in shares)			0
Outstanding (in shares)			2,668
Inducement Grants
Stock Options
Outstanding, beginning (in shares)			810,343
Granted (in shares)			49,166
Vested (in shares)			0
Expired or terminated (in shares)			(68,250)
Outstanding, ending (in shares)			791,259
Inducement Grants | Restricted Stock Units
Restricted Stock Units
Outstanding (in shares)			85,293
Granted (in shares)			13,385
Vested (in shares)			(29,076)
Expired or terminated (in shares)			0
Outstanding (in shares)			69,602