Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)		3 Months Ended	12 Months Ended
	Jan. 01, 2020	Mar. 31, 2020	Dec. 31, 2018	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Percentage of collection of receivables on product sales revenue		84.00%
Provision for credit losses		$ 130,000		$ 124,000
ASU 2016-13
Summary Of Significant Accounting Policies [Line Items]
Cumulative-effect adjustment to retained earnings	$ 0
Senior Secured Loan
Summary Of Significant Accounting Policies [Line Items]
Convertible bonds, aggregate principal value			$ 50,000,000
Debt maturity date			Jun. 30, 2023
LIBOR | Senior Secured Loan
Summary Of Significant Accounting Policies [Line Items]
Debt variable rate basis floor			2.00%
Basis spread on variable rate			9.00%
Pharmaceutical Wholesalers | Maximum
Summary Of Significant Accounting Policies [Line Items]
Provision for credit losses		100,000
Drug Manufacturers
Summary Of Significant Accounting Policies [Line Items]
Provision for credit losses		100,000
Hospitals and End-users | Maximum
Summary Of Significant Accounting Policies [Line Items]
Provision for credit losses		$ 100,000