Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 23, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 151	$ 151
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)	1,725,000	1,725,000
Preferred stock, shares outstanding (in shares)	1,725,000	1,725,000
Preferred stock, aggregate liquidation preference	$ 172,500
Common stock, shares authorized (in shares)	140,000,000	140,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	43,277,456	43,261,905
Common stock, shares outstanding (in shares)	43,277,456	43,261,905