Consolidated Statements of Changes in Stockholders' Equity (Current Period Unaudited) - USD ($) shares in Thousands, $ in Thousands		Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) (Predecessor [Member]) at Dec. 30, 2016		119,530
Balance (Predecessor [Member]) at Dec. 30, 2016		$ 1,195	$ 1,009,426	$ (2,600)	$ (1,306,591)	$ (298,570)
Cancellation of Predecessor equity (in shares) | Predecessor [Member]		(119,530)
Cancellation of Predecessor equity | Predecessor [Member]		$ (1,195)	(1,009,426)	2,600	1,306,591	298,570
Issuance of New Equity and New Warrants (in shares) | Predecessor [Member]		40,000
Issuance of New Equity and New Warrants | Predecessor [Member]		$ 400	725,464			725,864
Rights Offering (in shares) | Predecessor [Member]		15,464
Rights Offering | Predecessor [Member]		$ 155	199,845			200,000
Balance (in shares) at Dec. 31, 2016		55,464
Balance at Dec. 31, 2016		$ 555	925,309			925,864
Public offering of common stock, net of offering costs (in shares)		7,050
Public offering of common stock, net of offering costs		$ 71	215,849			215,920
Issuance of stock for business acquisition (in shares)		4,420
Issuance of stock for business acquisition		$ 44	138,122			138,166
Issuance of restricted stock, net of forfeitures (in shares)		1,718
Issuance of restricted stock, net of forfeitures		$ 17	(17)
Exercise of warrants (in shares)		2
Employee tax withholding on restricted stock vesting (in shares)		(107)
Employee tax withholding on restricted stock vesting		$ (1)	(3,841)			(3,842)
Share-based compensation			23,437			23,437
Net income (loss)					22,457	22,457
Foreign currency translation gain (loss), net of tax				(580)		(580)
Balance (in shares) at Dec. 31, 2017		68,547
Balance at Dec. 31, 2017		$ 686	1,298,859	(580)	22,457	1,321,422
Issuance of restricted stock, net of forfeitures		$ (1)	1
Employee tax withholding on restricted stock vesting (in shares)		(80)
Employee tax withholding on restricted stock vesting		$ (1)	(2,192)			(2,193)
Share-based compensation			10,917			10,917
Net income (loss)					49,090	49,090
Foreign currency translation gain (loss), net of tax				320		320
Issuance of restricted stock, net of forfeitures (in shares)		(80)
Balance (in shares) at Jun. 30, 2018	[1]	68,387
Balance at Jun. 30, 2018	[1]	$ 684	1,307,585	(260)	58,387	1,366,396
Cumulative effect from change in accounting principle					$ (13,160)	$ (13,160)

[1] Unaudited