Financial Instruments and Fair Value Measurements (Schedules of Concentration of Risk) (Details)	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Sep. 30, 2022	Jun. 16, 2022	Sep. 29, 2023	Dec. 30, 2022
Distributor Concentration Risk | Revenue from Contract with Customer Benchmark [Member] | Amerisource Bergen Corporation [Member]
Concentration Risk
Concentration Risk, Percentage	13.30%
Distributor Concentration Risk | Revenue from Contract with Customer Benchmark [Member] | CuraScript, Inc
Concentration Risk
Concentration Risk, Percentage				15.60%
Distributor Concentration Risk | Revenue from Contract with Customer Benchmark [Member] | FFF Enterprises, Inc.
Concentration Risk
Concentration Risk, Percentage	24.00%	25.70%	26.10%	11.80%	22.40%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Amerisource Bergen Corporation [Member]
Concentration Risk
Concentration Risk, Percentage	31.30%					23.30%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | McKesson Corporation [Member]
Concentration Risk
Concentration Risk, Percentage	17.80%					17.30%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | FFF Enterprises, Inc.
Concentration Risk
Concentration Risk, Percentage						16.20%
Product Concentration Risk | Net Sales Attributable to Products | Acthar
Concentration Risk
Concentration Risk, Percentage	24.60%	27.80%	27.00%	25.40%	23.00%
Product Concentration Risk | Net Sales Attributable to Products | Inomax
Concentration Risk
Concentration Risk, Percentage	14.70%	17.10%	17.30%	19.00%	16.60%
Product Concentration Risk | Net Sales Attributable to Products | Therakos [Member]
Concentration Risk
Concentration Risk, Percentage	13.30%	12.40%	12.50%	12.50%	13.40%
Product Concentration Risk | Net Sales Attributable to Products | APAP
Concentration Risk
Concentration Risk, Percentage	11.60%	12.60%	12.40%	11.00%	11.70%