Restructuring Costs Related To Sale Of Commercial Product Portfolio (Details) $ in Thousands		3 Months Ended
	Mar. 01, 2019 employee	May 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of employees terminated or given notice of termination | employee	88
Revenue from contract with customer			$ 0	$ 0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs expected cost remaining			1,100
Employee Severance, Terminated March 1, 2019 [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs			8,300
Employee Severance, Terminated March 1, 2019 [Member] | Employee Severance [Member] | Income (Loss) From Discontinued Operations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs			6,300
Employee Severance, Terminated March 1, 2019 [Member] | Employee Severance [Member] | Selling, general and administrative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs			1,500
Employee Severance, Terminated March 1, 2019 [Member] | Employee Severance [Member] | Research and development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs			500
Employee Severance, Terminated May 31, 2019 [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs			200
Employee Severance, Terminated May 31, 2019 [Member] | Employee Severance [Member] | Selling, general and administrative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs expected cost remaining			400
Scenario, Forecast [Member] | Employee Severance, Terminated May 31, 2019 [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs		$ 600
Discontinued Operations, Current Liabilities [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs expected cost remaining			400
Accrued Employee Benefits [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs expected cost remaining			700
Acrotech Biopharma LLC [Member] | Service [Member]
Restructuring Cost and Reserve [Line Items]
Revenue from contract with customer			$ 0