(Schedules of Concentration of Risk) (Details)	12 Months Ended
	Sep. 30, 2016	Sep. 25, 2015	Sep. 26, 2014
Distributor Concentration Risk | Net Sales Attributable to Distributors | CuraScript, Inc [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	38.00%	35.00%	7.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | McKesson Corporation [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	12.00%	20.00%	25.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | Cardinal Health, Inc. [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	7.00%	11.00%	18.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | Amerisource Bergen Corporation [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	8.00%	10.00%	15.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | CuraScript, Inc [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	18.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | McKesson Corporation [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	30.00%	26.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Cardinal Health, Inc. [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	13.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Amerisource Bergen Corporation [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	15.00%	13.00%
Product Concentration Risk | Net Sales Attributable to Products | Acetaminophen products (API)
Concentration Risk [Line Items]
Concentration risk, percentage	5.00%	7.00%	12.00%
Product Concentration Risk | Net Sales Attributable to Products | Acthar
Concentration Risk [Line Items]
Concentration risk, percentage	34.00%	35.00%	7.00%
Product Concentration Risk | Net Sales Attributable to Products | Inomax
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	6.00%	0.00%
Product Concentration Risk | Net Sales Attributable to Products | Hydrocodone (API) and hydrocodone-containing tablets
Concentration Risk [Line Items]
Concentration risk, percentage	3.00%	5.00%	13.00%