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Restatement of the Consolidated Financial Statements - Effects of Restatements of Consolidated Statement of Operations and Comprehensive Income (Loss) (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Product sales                 $ 352,796 $ 401,039 $ 405,147
Marketing service fees                 47,738 46,542 36,824
Net sales 106,143 92,738 98,280 103,373 117,365 107,857 113,423 108,936 400,534 447,581 441,971
Cost of sales 32,517 23,920 20,246 25,617 24,944 24,384 27,547 21,378 102,300 98,253 95,527
Gross profit 73,626 68,818 78,034 77,756 92,421 83,473 85,876 87,558 298,234 349,328 346,444
Operating expenses                      
Sales and marketing                 176,581 187,131 193,511
General and administrative                 65,147 53,391 64,481
Research and development                 26,768 28,577 22,861
Amortization of intangible assets                 2,687 2,298 2,550
Charges related to U.S. Government resolutions (Note 17)                   1,295 57,141
Total operating expenses 80,004 84,418 69,230 69,669 66,808 64,668 71,578 69,638 303,321 272,692 340,544
Operating (loss) income 6,378 (15,600) 8,804 8,087 25,613 18,805 14,298 17,920 (5,087) 76,636 5,900
Other income and (expense)                      
Interest expense, net                 (1,925) (4,743) (5,541)
Other expense                 2,220 (1,705) (2,412)
Total other income (expense)                 295 (6,448) (7,953)
Income (loss) before income taxes                 (4,792) 70,188 (2,053)
Income tax (expense) benefit                 (10,116) (25,138) (14,165)
Net income (loss) from continuing operations (8,564) (18,084) 4,130 7,610 16,009 10,574 9,870 8,597 (14,908) 45,050 (16,218)
Discontinued operations (Note 16)                      
Gain on sale of Breg, Inc                   1,345  
Income (loss) from discontinued operations                 (15,510) (2,994) (2,705)
Income tax (expense) benefit                 4,903 (563) 813
Net income (loss) from discontinued operations                 (10,607) (2,212) (1,892)
Net income (loss)                 (25,515) 42,838 (18,110)
Net income (loss) per common share-basic:                      
Net income (loss) from continuing operations $ (0.47) $ (1.00) $ 0.22 $ 0.39 $ 0.83 $ 0.55 $ 0.52 $ 0.46 $ (0.80) $ 2.37 $ (0.89)
Net income (loss) from discontinued operations                 $ (0.57) $ (0.12) $ (0.10)
Net income (loss) per common share-basic $ (0.43) $ (1.10) $ (0.12) $ 0.23 $ 1.10 $ 0.26 $ 0.38 $ 0.50 $ (1.37) $ 2.25 $ (0.99)
Net income (loss) per common share-diluted:                      
Net income (loss) from continuing operations $ (0.47) $ (1.00) $ 0.21 $ 0.39 $ 0.81 $ 0.54 $ 0.51 $ 0.45 $ (0.80) $ 2.32 $ (0.89)
Net income (loss) from discontinued operations                 $ (0.57) $ (0.11) $ (0.10)
Net income (loss) per common share-diluted: $ (0.43) $ (1.10) $ (0.12) $ 0.23 $ 1.07 $ 0.25 $ 0.37 $ 0.49 $ (1.37) $ 2.21 $ (0.99)
Weighted average number of common shares:                      
Basic                 18,697,228 18,977,263 18,219,343
Diluted                 18,697,228 19,390,413 18,219,343
Other comprehensive income (loss), before tax:                      
Translation adjustment                 (1,768) 768 (2,279)
Unrealized gain (loss) on derivative instrument                 (442) 416 (693)
Other comprehensive income (loss), before tax                 (2,210) 1,184 (2,972)
Income tax (expense) benefit related to components of other comprehensive income 164       (153)       164 (153) 256
Other comprehensive income (loss), net of tax                 (2,046) 1,031 (2,716)
Comprehensive income (loss)                 (27,561) 43,869 (20,826)
As Previously or Currently Reported [Member]
                     
Product sales                   415,850 432,975
Marketing service fees                   46,470 37,146
Net sales          100,254 112,035 114,752 119,492 116,041    462,320 470,121
Cost of sales          22,699 18,504 22,373 23,676 21,939    86,492 92,619
Gross profit          77,555 93,531 92,379 95,816 94,102    375,828 377,502
Operating expenses                      
Sales and marketing                   200,343 200,145
General and administrative                   53,827 64,374
Research and development                   28,577 22,861
Amortization of intangible assets                   2,098 2,350
Charges related to U.S. Government resolutions (Note 17)                   1,973 56,463
Total operating expenses          73,531 69,050 70,846 75,251 71,671    286,818 346,193
Operating (loss) income          4,024 24,481 21,533 20,565 22,431    89,010 31,309
Other income and (expense)                      
Interest expense, net                   (4,577) (9,456)
Other expense                   (1,705) (2,412)
Total other income (expense)                   (6,282) (11,868)
Income (loss) before income taxes                   82,728 19,441
Income tax (expense) benefit                   (28,792) (21,181)
Net income (loss) from continuing operations          4,908 14,636 13,118 13,967 12,215    53,936 (1,740)
Discontinued operations (Note 16)                      
Gain on sale of Breg, Inc                   1,345  
Income (loss) from discontinued operations                   (4,012) 1,263
Income tax (expense) benefit                   26 (596)
Net income (loss) from discontinued operations                   (2,641) 667
Net income (loss)                   51,295 (1,073)
Net income (loss) per common share-basic:                      
Net income (loss) from continuing operations          $ 0.25 $ 0.76 $ 0.69 $ 0.74 $ 0.65    $ 2.84 $ (0.10)
Net income (loss) from discontinued operations                   $ (0.14) $ 0.04
Net income (loss) per common share-basic          $ 0.11 $ 1.06 $ 0.40 $ 0.59 $ 0.64    $ 2.70 $ (0.06)
Net income (loss) per common share-diluted:                      
Net income (loss) from continuing operations          $ 0.25 $ 0.74 $ 0.67 $ 0.73 $ 0.64    $ 2.78 $ (0.10)
Net income (loss) from discontinued operations                   $ (0.14) $ 0.04
Net income (loss) per common share-diluted:          $ 0.11 $ 1.04 $ 0.39 $ 0.58 $ 0.63    $ 2.64 $ (0.06)
Weighted average number of common shares:                      
Basic                   18,977,263 18,219,343
Diluted                   19,390,413 18,219,343
Other comprehensive income (loss), before tax:                      
Translation adjustment                   480 (3,192)
Unrealized gain (loss) on derivative instrument                   416 (693)
Other comprehensive income (loss), before tax                   896 (3,885)
Income tax (expense) benefit related to components of other comprehensive income         (153)         (153) 256
Other comprehensive income (loss), net of tax                   743 (3,629)
Comprehensive income (loss)                   52,038 (4,702)
Restatement Adjustments [Member]
                     
Product sales                   (14,811) (27,828)
Marketing service fees                   72 (322)
Net sales          3,119 5,330 (6,895) (6,069) (7,105)    (14,739) (28,150)
Cost of sales          2,918 6,440 2,011 3,871 (561)    11,761 2,908
Gross profit          201 (1,110) (8,906) (9,940) (6,544)    (26,500) (31,058)
Operating expenses                      
Sales and marketing                   (13,212) (6,634)
General and administrative                   (436) 107
Amortization of intangible assets                   200 200
Charges related to U.S. Government resolutions (Note 17)                   (678) 678
Total operating expenses          (3,862) (2,242) (6,178) (3,673) (2,033)    (14,126) (5,649)
Operating (loss) income          4,063 1,132 (2,728) (6,267) (4,511)    (12,374) (25,409)
Other income and (expense)                      
Interest expense, net                   (166) 3,915
Total other income (expense)                   (166) 3,915
Income (loss) before income taxes                   (12,540) (21,494)
Income tax (expense) benefit                   3,654 7,016
Net income (loss) from continuing operations          2,702 1,373 (2,544) (4,097) (3,618)    (8,886) (14,478)
Discontinued operations (Note 16)                      
Income (loss) from discontinued operations                   1,018 (3,968)
Income tax (expense) benefit                   (589) 1,409
Net income (loss) from discontinued operations                   429 (2,559)
Net income (loss)                   (8,457) (17,037)
Net income (loss) per common share-basic:                      
Net income (loss) from continuing operations          $ 0.14 $ 0.07 $ (0.14) $ (0.22) $ (0.19)    $ (0.47) $ (0.79)
Net income (loss) from discontinued operations                   $ 0.02 $ (0.14)
Net income (loss) per common share-basic          $ 0.12 $ 0.04 $ (0.14) $ (0.21) $ (0.14)    $ (0.45) $ (0.93)
Net income (loss) per common share-diluted:                      
Net income (loss) from continuing operations          $ 0.14 $ 0.07 $ (0.13) $ (0.22) $ (0.19)    $ (0.46) $ (0.79)
Net income (loss) from discontinued operations                   $ 0.03 $ (0.14)
Net income (loss) per common share-diluted:          $ 0.12 $ 0.03 $ (0.14) $ (0.21) $ (0.14)    $ (0.43) $ (0.93)
Other comprehensive income (loss), before tax:                      
Translation adjustment                   288 913
Other comprehensive income (loss), before tax                   288 913
Other comprehensive income (loss), net of tax                   288 913
Comprehensive income (loss)                   $ (8,169) $ (16,124)