(Schedules of Concentration of Risk) (Details)	12 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 27, 2013
Distributor Concentration Risk | Net Sales Attributable to Distributors | CuraScript, Inc [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	31.00%	6.00%	0.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | McKesson Corporation [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	18.00%	21.00%	19.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | Cardinal Health, Inc. [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	22.00%	24.00%
Distributor Concentration Risk | Net Sales Attributable to Distributors | Amerisource Bergen Corporation [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	9.00%	14.00%	11.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | CuraScript, Inc [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	16.00%	15.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | McKesson Corporation [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	24.00%	27.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Cardinal Health, Inc. [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	13.00%	18.00%
Distributor Concentration Risk | Accounts Receivable Attributable to Distributors | Amerisource Bergen Corporation [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	12.00%	14.00%
Product Concentration Risk | Net Sales Attributable to Products | Acetaminophen products (API)
Concentration Risk [Line Items]
Concentration risk, percentage	6.00%	9.00%	13.00%
Product Concentration Risk | Net Sales Attributable to Products | Acthar
Concentration Risk [Line Items]
Concentration risk, percentage	31.00%	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	4.00%	10.00%	9.00%