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Debt - Senior Credit Facility (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 22, 2017	Dec. 31, 2016	Oct. 01, 2016	Sep. 30, 2016	Sep. 29, 2016	Aug. 01, 2016	Jun. 01, 2016	May 31, 2016
Senior Secured Revolving Credit Facility
Line of Credit Facility [Line Items]
Adjusted tangible net worth threshold (greater than)	$ 18,000,000
Maximum leverage ratio	250.00%
Debt default, change in control, ownership percentage (less than)	40.00%
Debt default, material judgment (in excess of)	$ 5,000,000
Senior Secured Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Fixed charge coverage ratio	125.00%
Revolving Credit Facility | Working Capital Line
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 82,500,000	$ 70,000,000.0	$ 60,000,000	$ 82,500,000	$ 82,500,000.0		$ 82,500,000.0	$ 60,000,000
Required minimum availability							$ 40,000,000
Reduction to interest rate if facility utilization is less than fifty percent	0.25%
Commitment fee percentage	0.375%
Nonutilization fee	0.50%
Adjusted tangible net worth, aggregate commitments percentage	20.00%
Revolving Credit Facility | Working Capital Line | Maximum
Line of Credit Facility [Line Items]
Line of credit, availability	$ 82,500,000.0
Borrowing base calculated on value of eligible accounts receivable, unbilled product sales, inventory and other working capital assets, percentage	90.00%
Revolving Credit Facility | Working Capital Line | Minimum
Line of Credit Facility [Line Items]
Line of credit, availability	$ 40,000,000
Borrowing base calculated on value of eligible accounts receivable, unbilled product sales, inventory and other working capital assets, percentage	80.00%
Consolidated net working capital through December 30, 2016	$ 5,000,000
Consolidated net working capital through December 30, 2016, percentage	15.00%
Revolving Credit Facility | Working Capital Line | Eurodollar
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.00%
Revolving Credit Facility | Working Capital Line | Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.00%
Revolving Credit Facility | Working Capital Line | Federal Funds Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility | Working Capital Line | Reference Eurodollar Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Revolving Credit Facility | Working Capital Line | Cost of Funds Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.50%
Revolving Credit Facility | Acquisition Line
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 25,000,000
Financing of cost of acquisitions, maximum percentage	75.00%
Nonutilization fee	0.50%
Adjusted tangible net worth, borrowings percentage	33.00%
Revolving Credit Facility | Acquisition Line | Eurodollar | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	3.75%
Revolving Credit Facility | Acquisition Line | Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%
Revolving Credit Facility | Acquisition Line | Federal Funds Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility | Acquisition Line | Reference Eurodollar Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%

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Debt Instrument, Debt Default, Change in Control, Ownership Percentage, Minimum

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Line of Credit Facility, Borrowing Base Calculated as Percentage of Accounts Receivable, Unbilled Product Sales, Inventory, Other Working Capital Assets

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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