Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.19.1
Income Taxes - Additional Information (Details) - USD ($)
12 Months Ended
Jan. 03, 2019
Dec. 31, 2018
Dec. 31, 2017
Operating Loss Carryforwards [Line Items]      
Income tax benefit   $ 6,736,000 $ 0
Loss before taxes   $ 19,204,000 $ 25,060,000
Corporate income tax rate   21.00% 34.00%
Temporary expensing for certain business assets and property, percent   100.00%  
Maximum deduction percentage of pre-NOL taxable income   80.00%  
Unrecognized tax benefits that would impact effective tax rate   $ 0  
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit   0  
Income tax examination, penalties and interest accrued   $ 0  
Maximum      
Operating Loss Carryforwards [Line Items]      
Corporate income tax rate   21.00% 35.00%
Federal      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforward   $ 194,900,000 $ 171,500,000
Tax credit carryforward   3,100,000  
NOL subject to expiration   171,900,000  
NOL subject not to expiration   $ 23,000,000  
NOL expiration date   Dec. 31, 2038  
State      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforward   $ 150,800,000 $ 166,400,000
State | New Jersey | Subsequent Event      
Operating Loss Carryforwards [Line Items]      
Cash receipt from the sale of state NOLs $ 6,700,000