Fair Value Measurements - Quantitative Information about the Inputs and Valuation Methodologies Used for Fair Value Measurements (Details) - Earn Out Liability - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2018	Dec. 30, 2017
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Liabilities, Fair Value Measurements	$ 509	$ 572
Level 3
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Liabilities, Fair Value Measurements	509	572
Level 3 \| Discounted Cash Flow
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Liabilities, Fair Value Measurements	$ 509	$ 572
Valuation Technique, Earn-out liability	Discounted cash flow	Discounted cash flow
Level 3 \| Discounted Cash Flow \| Weighted Average
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Weighted Average, Projected royalties	$ 1,539	$ 1,622
Weighted Average, Discount rate	10.41%	10.90%
Level 3 \| Discounted Cash Flow \| Minimum
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Weighted Average, Discount rate	10.41%	10.90%
Level 3 \| Discounted Cash Flow \| Maximum
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Weighted Average, Discount rate	27.00%	27.00%

Fair value inputs projected royalties amount.

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- References

No definition available.

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

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- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

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- Definition

Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity.

+ References

No definition available.

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