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Capital Lease Obligations - Additional information (Details) (USD $)
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3 Months Ended | ||
|---|---|---|---|
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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| Capital Leased Assets [Line Items] | |||
| Purchases of property and equipment under capital lease | $ 5,721,000 | $ 0 | |
| Interest Expense | 300,000 | 300,000 | |
| Machinery and Equipment [Member] | |||
| Capital Leased Assets [Line Items] | |||
| Manufacturing equipment | 13,705,000 | 7,984,000 | |
| Property, Plant and Equipment, Useful Life | 5 years | ||
| Amortization Expense | $ 500,000 | $ 300,000 | |
| Minimum | |||
| Capital Leased Assets [Line Items] | |||
| Repayment Period for Capital Lease Obligations | 24 months | ||
| Capital Leases of Lessee, Contingent Rentals, Effective Interest Rate | 13.00% | ||
| Maximum | |||
| Capital Leased Assets [Line Items] | |||
| Repayment Period for Capital Lease Obligations | 36 months | ||
| Capital Leases of Lessee, Contingent Rentals, Effective Interest Rate | 17.00% | ||