Product Revenue and Concentration of Credit Risks (Tables)

3 Months Ended

Mar. 31, 2021

Disaggregation of Revenue [Abstract]

Revenue Provisions, and Credits or Payments for Sales-related Deductions

The following table summarizes the provisions, and credits/payments, for sales-related deductions.

(In thousands)	Rebates		Trade Discounts, Distributor Fees and Other		Total
Balance at December 31, 2020	$	1,161	$	129	$	1,290
Current period provisions	1,904		593		2,497
Credits/payments	(774)		(481)		(1,255)
Balance at March 31, 2021	$	2,291	$	241	$	2,532