Consolidated Statements of Changes in Stockholder's Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Common Stock [Member]	Common Stock [Member] Common Stock [Member]	Common Stock [Member] Preferred Stock [Member]	Common Stock [Member] Additional Paid-in Capital [Member]
Beginning balance (in shares) at Dec. 31, 2017		35,436,252	100
Beginning balance at Dec. 31, 2017	$ 169,060	$ 354	$ 0	$ 144,650	$ 25,407	$ (1,210)	$ (141)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,585			1,585
Vesting of non-vested shares and excess tax benefits (in shares)		283,248
Vesting of non-vested shares	0	$ 3		(3)
Net income (loss)	(3,102)				(3,102)
Ending balance (in shares) at Apr. 01, 2018		35,719,500	100
Ending balance at Apr. 01, 2018	167,543	$ 357	$ 0	146,232	22,305	(1,210)	(141)
Beginning balance (in shares) at Dec. 31, 2017		35,436,252	100
Beginning balance at Dec. 31, 2017	169,060	$ 354	$ 0	144,650	25,407	(1,210)	(141)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	4,686
Ending balance (in shares) at Jul. 01, 2018		35,722,838	100
Ending balance at Jul. 01, 2018	176,716	$ 358	$ 0	147,616	30,093	(1,210)	(141)
Beginning balance (in shares) at Apr. 01, 2018		35,719,500	100
Beginning balance at Apr. 01, 2018	167,543	$ 357	$ 0	146,232	22,305	(1,210)	(141)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,385			1,385
Vesting of non-vested shares and excess tax benefits (in shares)		3,338
Vesting of non-vested shares	0	$ 1		(1)
Net income (loss)	7,788				7,788
Ending balance (in shares) at Jul. 01, 2018		35,722,838	100
Ending balance at Jul. 01, 2018	$ 176,716	$ 358	$ 0	147,616	30,093	(1,210)	(141)
Beginning balance (in shares) at Dec. 30, 2018	35,742,427
Beginning balance at Dec. 30, 2018	$ 185,540
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,526
Vesting of non-vested shares and excess tax benefits (in shares)		371,824
Vesting of non-vested shares	0	$ 4		(4)
Net income (loss)	(11,469)
Ending balance (in shares) at Mar. 31, 2019		36,114,251	100
Ending balance at Mar. 31, 2019	$ 183,101	$ 361	$ 0	151,981	31,546	(646)	(141)
Beginning balance (in shares) at Dec. 30, 2018	35,742,427
Beginning balance at Dec. 30, 2018	$ 185,540
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance (in shares)								7,400,000
Net income (loss)	$ (15,201)
Ending balance (in shares) at Jun. 30, 2019	36,114,251	43,481,142	10,100
Ending balance at Jun. 30, 2019	$ 325,984	$ 435	$ 0	298,381	27,814	(646)	0
Beginning balance (in shares) at Mar. 31, 2019		36,114,251	100
Beginning balance at Mar. 31, 2019	183,101	$ 361	$ 0	151,981	31,546	(646)	(141)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,282			1,282
Vesting of non-vested shares and excess tax benefits (in shares)		2,478
Vesting of non-vested shares	0
Issuance (in shares)									7,364,413	10,000
Issuance								$ 145,333	$ 74		$ 145,259
Retirement of treasury stock	0			(141)			141
Net income (loss)	$ (3,732)				(3,732)
Ending balance (in shares) at Jun. 30, 2019	36,114,251	43,481,142	10,100
Ending balance at Jun. 30, 2019	$ 325,984	$ 435	$ 0	$ 298,381	$ 27,814	$ (646)	$ 0