Commitments and Contingencies - Forgivable Grant (Details)		1 Months Ended			3 Months Ended	12 Months Ended
	Feb. 01, 2011 USD ($) job	Dec. 31, 2015 USD ($) job	Aug. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 30, 2015 USD ($)	Dec. 20, 2013 USD ($)	Oct. 31, 2013 USD ($)
Debt Instrument [Line Items]
Repayment of government grant						$ 101,000	$ 0	$ 0
Proceeds from government grants, training reimbursement						0	194,000	1,500,000
Other Commitments [Line Items]
Recognition of IEDA government grant						1,638,000	0	0
Forgivable Grant
Other Commitments [Line Items]
Deferred government grant obligation		$ 0			$ 0	$ 0	$ 2,300,000		$ 2,200,000
Forgivable Grant | Operating Expenses
Other Commitments [Line Items]
Recognition of IEDA government grant					608,000
Forgivable Grant | Other Operating Income (Expense)
Other Commitments [Line Items]
Recognition of IEDA government grant					$ 1,600,000
Forgivable Grant | February 2011, 6% IDED Forgivable Grant
Debt Instrument [Line Items]
Debt face amount	$ 2,300,000
Debt term	5 years
Debt stated interest rate	6.00%
Number of jobs required to create and retain for a specific period of time | job	251
Number of previous jobs required to maintain | job	6
Required investment in development plan	$ 31,600,000
Repayment amount per position	$ 8,799
Write off of debt interest expense								$ 260,000
Number of jobs failed that failed to meet requirement | job		10
Repayment of government grant		$ 88,000
Proceeds from government grants, sales tax grant				$ 313,000
Forgivable Grant | October 2013, IEDA Forgivable Loans
Debt Instrument [Line Items]
Debt maximum amount available											$ 2,500,000
Forgivable Grant | October 2013, Non-interest Bearing IEDA Loan
Debt Instrument [Line Items]
Proceeds from government grants, training reimbursement			$ 235,000
Debt maximum amount available											$ 2,500,000
Forgivable Grant | October 2013, IEDA Loans
Debt Instrument [Line Items]
Debt face amount										$ 2,000,000