Stock-Based Compensation Expense (Details) $ / shares in Units, $ in Thousands				3 Months Ended		6 Months Ended
	Apr. 21, 2015	Feb. 19, 2015 $ / shares	Aug. 26, 2014 shares	Jun. 29, 2015 USD ($) $ / shares shares	Jun. 30, 2014 USD ($) $ / shares shares	Jun. 29, 2015 USD ($) Installment $ / shares shares	Jun. 30, 2014 USD ($) Installment $ / shares shares
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total non-cash, stock-based compensation expense, net of forfeitures | $				$ 734	$ 131	$ 843	$ 299
Market-based Vested Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Number of installments in which restricted common stock vest | Installment						4
Time Vested Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Additional vesting percentage on each anniversary of the grant date (in hundredths)						25.00%
Number of installments in which restricted common stock vest | Installment						4
Closing Price $3.50 [Member] | Market-based Vested Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage on each specified closing price (in hundredths)						25.00%
Closing price (in dollars per share) | $ / shares				$ 3.50		$ 3.50
Consecutive trading days						30 days
Closing Price $4.00 [Member] | Market-based Vested Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage on each specified closing price (in hundredths)						25.00%
Closing price (in dollars per share) | $ / shares				4.00		$ 4.00
Consecutive trading days						30 days
Closing Price $4.50 [Member] | Market-based Vested Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage on each specified closing price (in hundredths)						25.00%
Closing price (in dollars per share) | $ / shares				4.50		$ 4.50
Consecutive trading days						30 days
Closing Price $5.00 [Member] | Market-based Vested Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage on each specified closing price (in hundredths)						25.00%
Closing price (in dollars per share) | $ / shares				$ 5.00		$ 5.00
Consecutive trading days						30 days
Restricted shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation expense related to stock options | $				$ 1,700		$ 1,700
Restricted shares issued (in shares)				31,250	100	131,250	100
Value of the shares for the grants made during period | $						$ 200	$ 0
Value of the forfeited shares | $						$ 200	$ 0
Number of Shares [Roll Forward]
Unvested restricted common stock at the beginning of the period (in shares)						1,235,064
Granted (in shares)						762,712
Vested (in shares)						(539,063)
Forfeited (in shares)				(31,250)	(100)	(131,250)	(100)
Unvested restricted common stock at the end of the period (in shares)				1,327,463		1,327,463
Weighted Average Grant-Date Fair Value [Roll Forward]
Unvested restricted common stock at the beginning of the period (in dollars per share) | $ / shares						$ 1.10
Granted (in dollars per share) | $ / shares						2.22
Vested (in dollars per share) | $ / shares						0.60
Forfeited (in dollars per share) | $ / shares						1.39
Unvested restricted common stock at the end of the Period (in dollars per share) | $ / shares				$ 1.63		$ 1.63
Aggregate intrinsic value of non-vested restricted stock awards | $				$ 700		$ 700
Restricted shares [Member] | Key Employees [Member]
Number of Shares [Roll Forward]
Granted (in shares)				762,713	175,000		1,204,164
Restricted shares [Member] | Key Employees [Member] | Market-based Vested Shares [Member]
Number of Shares [Roll Forward]
Granted (in shares)					87,500
Restricted shares [Member] | Key Employees [Member] | Time Vested Shares [Member]
Number of Shares [Roll Forward]
Granted (in shares)					87,500
Restricted shares [Member] | Key Employees [Member] | Condition 1 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restricted shares issued (in shares)			(75,000)
Restricted shares granted with specified vesting schedule (in shares)							200,000
Vesting percentage (in hundredths)							50.00%
Number of installments in which restricted common stock vest | Installment							4
Number of Shares [Roll Forward]
Forfeited (in shares)			75,000
Restricted shares [Member] | Key Employees [Member] | Condition 2 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Restricted shares granted with specified vesting schedule (in shares)							1,004,164
Vesting percentage (in hundredths)							50.00%
Additional vesting percentage on each anniversary of the grant date (in hundredths)							25.00%
Vesting percentage on grant date with specified vesting schedule (in hundredths)							50.00%
Restricted shares [Member] | Key Employees [Member] | Closing Price $2.00 [Member] | Condition 2 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage on each specified closing price (in hundredths)	25.00%	25.00%					25.00%
Closing price (in dollars per share) | $ / shares		$ 2.00			$ 2.00		$ 2.00
Consecutive trading days							30 days
Restricted shares [Member] | Key Employees [Member] | Closing Price $2.50 [Member] | Condition 2 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage on each specified closing price (in hundredths)	25.00%
Closing price (in dollars per share) | $ / shares					2.50		$ 2.50
Consecutive trading days							30 days
Restricted shares [Member] | Key Employees [Member] | Closing Price $3.00 [Member] | Condition 2 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage on each specified closing price (in hundredths)							25.00%
Closing price (in dollars per share) | $ / shares					3.00		$ 3.00
Consecutive trading days							30 days
Restricted shares [Member] | Key Employees [Member] | Closing Price $4.00 [Member] | Condition 2 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage on each specified closing price (in hundredths)							25.00%
Closing price (in dollars per share) | $ / shares					$ 4.00		$ 4.00
Consecutive trading days							30 days
Restricted shares [Member] | Members of the Board of Directors [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares issued (in shares)				5,729	1,751	105,556	44,640
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized compensation expense related to stock options | $				$ 1,700		$ 1,700
Restricted Stock and Restricted Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Value of the shares for the grants made during period | $						$ 1,600	$ 1,200
Bonus Grants [Member] | Key Employees [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage (in hundredths)				50.00%
Number of Shares [Roll Forward]
Granted (in shares)				258,302
Bonus Grants [Member] | Key Employees [Member] | March 1, 2016 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting percentage (in hundredths)				50.00%
Long Term Incentive Grants [Member] | Key Employees [Member]
Number of Shares [Roll Forward]
Granted (in shares)				279,411
Long Term Incentive Grants [Member] | Key Employees [Member] | Market-based Vested Shares [Member]
Number of Shares [Roll Forward]
Granted (in shares)				139,706
Long Term Incentive Grants [Member] | Key Employees [Member] | Time Vested Shares [Member]
Number of Shares [Roll Forward]
Granted (in shares)				139,706
New Employee Grants [Member] | Key Employees [Member]
Number of Shares [Roll Forward]
Granted (in shares)				225,000
New Employee Grants [Member] | Key Employees [Member] | Market-based Vested Shares [Member]
Number of Shares [Roll Forward]
Granted (in shares)				112,500
New Employee Grants [Member] | Key Employees [Member] | Time Vested Shares [Member]
Number of Shares [Roll Forward]
Granted (in shares)				112,500