Long-Term Debt and Other Financing Arrangements - Thermo Loan Agreement (Details) - USD ($)		1 Months Ended			9 Months Ended
	Jun. 22, 2015	Aug. 31, 2015	Jun. 30, 2015	Feb. 28, 2015	Sep. 30, 2015	Dec. 28, 2012
Debt Instrument [Line Items]
Maximum value of shares required to be purchased per terms of stock purchase agreement		$ 75,000,000.0			$ 15,000,000.0	$ 30,000,000.0
Thermo
Debt Instrument [Line Items]
Maximum value of shares required to be purchased per terms of stock purchase agreement		30,000,000.0
Terrapin
Debt Instrument [Line Items]
Maximum value of shares required to be purchased per terms of stock purchase agreement					$ 60,000,000
Proceeds from lines of credit	$ 14,000,000	$ 15,000,000	$ 14,000,000	$ 10,000,000
Number of shares issued (in shares)		9,300,000	6,600,000	4,500,000	17,200,000.0
Shares issued, price per share (USD per share)		$ 1.61	$ 2.13	$ 2.22
Thermo Loan Agreement | Thermo
Debt Instrument [Line Items]
Loan interest rate					12.00%
Maturity period after full payment of Facility Agreement					6 months
Outstanding interest					$ 37,200,000
Line of credit facility, increase		$ 6,000,000