Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2018

Change in Accounting Principle

Summary of impact on adoption of accounting standards on previously reported financial position and results

	December 31, 2017
	as reported		Adjustments		as adjusted
	(in thousands)
Balance Sheet
Contract assets	—		160		160
Deferred cost of sales	16,060		(66	)	15,994
Deferred income taxes	2,953		94		3,047
Accrued expenses and other current liabilities	60,339		(2,271	)	58,068
Customer deposits and deferred revenue	108,953		3,079		112,032
Additional paid-in capital	1,053,079		(1,126	)	1,051,953
Accumulated deficit	(213,376	)	506		(212,870	)

	Three months ended June 30, 2017									Six months ended June 30, 2017
	As reported			Adjustments			As adjusted			As reported			Adjustments			As adjusted
	(in thousands, except per share amounts)
Statement of Operations
Net sales	$	115,066		$	(2,848	)	$	112,218		$	209,452		$	(2,735	)	$	206,717
Cost of sales	76,346			25			76,371			136,533			(162		)	136,371
Income tax expense (benefit)	(12,897		)	(444		)	(13,341		)	(23,179		)	(689		)	(23,868		)
Net income (loss)	(18,388		)	(2,429		)	(20,817		)	(17,293		)	1,884			(19,177		)
Diluted earnings (loss) per	(0.43		)	(0.06		)	(0.49		)	(0.42		)	(0.05		)	(0.47		)