Restructuring, Impairment and Other Costs (Details Textual) - USD ($) $ in Thousands			3 Months Ended
	Mar. 07, 2019	Mar. 26, 2018	Mar. 31, 2019
Hugo Separation Agreement | Employee Severance
Restructuring Cost and Reserve [Line Items]
Severance pay, annual salary	$ 275
Term for base salary continuation	12 months
Costs Incurred			$ 300
Craig's Separation Agreement | Employee Severance
Restructuring Cost and Reserve [Line Items]
Term for base salary continuation			12 months
Restricted Stock
Restructuring Cost and Reserve [Line Items]
Continued vesting of shares of restricted stock (in shares)	1,934
Time-Vested Restricted Stock
Restructuring Cost and Reserve [Line Items]
Accelerated vesting, number (in shares)		5,488
Performance-Vested Restricted Stock
Restructuring Cost and Reserve [Line Items]
Accelerated vesting, number (in shares)		5,488
Salaries, Wages and Employee Benefits | Hugo Separation Agreement | Employee Severance
Restructuring Cost and Reserve [Line Items]
Severance costs			$ 300
Salaries, Wages and Employee Benefits | Craig's Separation Agreement | Employee Severance
Restructuring Cost and Reserve [Line Items]
Costs Incurred			700
Severance costs			$ 100