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QUARTERLY RESULTS (UNAUDITED) (Notes)
 12 Months Ended
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]  
QUARTERLY RESULTS (UNAUDITED)
QUARTERLY RESULTS (UNAUDITED)

The following information has been derived from unaudited consolidated financial statements that, in the opinion of management, include all normal recurring adjustments necessary for a fair presentation of such information.
(In thousands, except per share data)
Quarter Ended
2015
 
2014
 
Dec. 31
 
Sept. 30
 
June 30
 
Mar. 31
 
Dec. 31
 
Sept. 30
 
June 30
 
Mar. 31
Net revenues
$
138,806

 
$
137,436

 
$
109,767

 
$
119,586

 
$
128,196

 
$
142,429

 
$
124,644

 
$
134,982

Cost of revenues
54,912

 
47,672

 
43,306

 
47,492

 
50,548

 
52,788

 
50,420

 
50,665

Amortization of intangible assets
1,950

 
1,950

 
163

 
—

 
—

 
—

 
—

 
50

Gross profit
81,944

 
87,814

 
66,298

 
72,094

 
77,648

 
89,641

 
74,224

 
84,267

Operating expenses:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   Research and development
24,190

 
25,225

 
23,310

 
23,173

 
23,212

 
22,154

 
22,070

 
22,954

   Marketing and selling
30,091

 
31,564

 
32,811

 
28,045

 
34,527

 
31,410

 
34,297

 
32,815

   General and administrative
21,463

 
15,834

 
17,425

 
19,387

 
22,222

 
20,644

 
19,984

 
18,331

   Amortization of intangible assets
786

 
786

 
408

 
374

 
375

 
373

 
398

 
480

   Restructuring costs (recoveries), net
5,766

 
—

 
539

 
—

 
—

 
—

 
(165
)
 
—

   Total operating expenses
82,296

 
73,409

 
74,493

 
70,979

 
80,336

 
74,581

 
76,584

 
74,580

Operating (loss) income
(352
)
 
14,405

 
(8,195
)
 
1,115

 
(2,688
)
 
15,060

 
(2,360
)
 
9,687

Other expense, net
(1,727
)
 
(2,519
)
 
(1,439
)
 
(723
)
 
(1,620
)
 
(455
)
 
(357
)
 
(351
)
(Loss) income before income taxes
(2,079
)
 
11,886

 
(9,634
)
 
392

 
(4,308
)
 
14,605

 
(2,717
)
 
9,336

Provision for (benefit from) income taxes
2,306

 
768

 
(5,550
)
 
561

 
761

 
365

 
622

 
440

Net (loss) income
$
(4,385
)
 
$
11,118

 
$
(4,084
)
 
$
(169
)
 
$
(5,069
)
 
$
14,240

 
$
(3,339
)
 
$
8,896

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net (loss) income per share – basic and diluted
$
(0.11
)
 
$
0.28

 
$
(0.10
)
 
$
0.00

 
$
(0.13
)
 
$
0.36

 
$
(0.09
)
 
$
0.23

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding – basic
39,439

 
39,231

 
39,635

 
39,387

 
39,234

 
39,133

 
39,119

 
39,099

Weighted-average common shares outstanding – diluted
39,439

 
39,750

 
39,635

 
39,387

 
39,234

 
39,201

 
39,119

 
39,122