Accounts Receivable - Schedule of Allowance for Doubtful Accounts Roll Forward (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Sep. 28, 2012
Successor [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period	$ (100)	$ (7)	$ 0
Additions – charge to expense	0	(597)	(2)
Adjustments and/or deductions	100	528	(5)
Balance at end of period	0	(354)	(7)
Successor [Member] | JHP Group Holdings [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Opening balance of acquisition	0	(278)	0
Successor [Member] | Anchen Acquisition [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Opening balance of acquisition	0	0	0
Predecessor [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period				(1)
Additions – charge to expense				0
Adjustments and/or deductions				1
Balance at end of period				(100)
Predecessor [Member] | JHP Group Holdings [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Opening balance of acquisition				0
Predecessor [Member] | Anchen Acquisition [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Opening balance of acquisition				$ (100)