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REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS (Consolidated Statements of Operations) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012 | Mar. 31, 2013 As Reported [Member] | Dec. 31, 2012 As Reported [Member] | Sep. 30, 2012 As Reported [Member] | Jun. 30, 2012 As Reported [Member] | Mar. 31, 2012 As Reported [Member] | Dec. 31, 2011 As Reported [Member] | Sep. 30, 2011 As Reported [Member] | Jun. 30, 2011 As Reported [Member] | Mar. 31, 2013 As Reported [Member] | Mar. 31, 2012 As Reported [Member] | Mar. 31, 2011 As Reported [Member] | Mar. 31, 2013 As Revised [Member] | Dec. 31, 2012 As Revised [Member] | Sep. 30, 2012 As Revised [Member] | Jun. 30, 2012 As Revised [Member] | Mar. 31, 2012 As Revised [Member] | Dec. 31, 2011 As Revised [Member] | Sep. 30, 2011 As Revised [Member] | Jun. 30, 2011 As Revised [Member] | Mar. 31, 2013 As Revised [Member] | Mar. 31, 2012 As Revised [Member] | Mar. 31, 2011 As Revised [Member]
Error Corrections And Prior Period Adjustments Revisions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product revenue | $ 85,969 | $ 93,785 | $ 92,648 | $ 112,517 | $ 100,067 | $ 93,811 | $ 109,865 | $ 124,081 | $ 115,126 | $ 102,268 | $ 399,043 | $ 451,340 | $ 456,903 | $ 92,621 | $ 112,490 | $ 100,041 | $ 93,785 | $ 109,897 | $ 124,113 | $ 115,158 | $ 102,300 | $ 398,937 | $ 451,468 | $ 457,505
Royalty revenue | 25,508 | 10,981 |  |  |  |  | 14,031 | 14,049 | 14,015 | 14,571 | 44,492 | 56,666 | 64,272 |  |  |  |  | 14,031 | 14,049 | 14,015 | 14,059 | 44,492 | 56,154 | 64,784
Total revenue | 147,969 | 140,853 | 139,958 | 159,395 | 147,340 | 140,879 | 160,304 | 173,492 | 165,039 | 153,535 | 587,572 | 652,370 | 672,270 | 139,931 | 159,368 | 147,314 | 140,853 | 160,336 | 173,524 | 165,071 | 153,055 | 587,466 | 651,986 | 673,384
Cost of service revenue | 19,231 | 20,304 | 19,721 | 19,360 | 20,232 | 20,334 | 22,727 | 22,537 | 21,129 | 22,066 | 79,647 | 88,459 | 94,311 | 19,708 | 19,360 | 20,232 | 20,304 | 22,722 | 22,548 | 21,132 | 22,064 | 79,604 | 88,466 | 94,311
Total cost of revenue | 78,014 | 85,054 | 82,354 | 91,367 | 88,116 | 85,084 | 95,059 | 99,775 | 93,428 | 90,273 | 346,921 | 378,535 | 389,288 | 82,341 | 91,367 | 88,116 | 85,054 | 95,054 | 99,786 | 93,431 | 90,271 | 346,878 | 378,542 | 389,288
Gross margin | 69,955 | 55,799 | 57,604 | 68,028 | 59,224 | 55,795 | 65,245 | 73,717 | 71,611 | 63,262 | 240,651 | 273,835 | 282,982 | 57,590 | 68,001 | 59,198 | 55,799 | 65,282 | 73,738 | 71,640 | 62,784 | 240,588 | 273,444 | 284,096
Sales and marketing | 30,158 | 34,444 | 33,734 | 33,588 | 34,441 | 35,278 | 35,948 | 33,350 | 31,115 | 30,525 | 137,041 | 130,938 | 122,768 | 34,400 | 33,588 | 34,441 | 34,444 | 36,069 | 33,736 | 31,171 | 30,263 | 136,873 | 131,239 | 122,767
Total operating expenses | 64,108 | 69,773 | 69,893 | 73,656 | 69,195 | 70,607 | 72,251 | 66,738 | 66,211 | 64,943 | 283,351 | 270,143 | 258,278 | 70,559 | 73,656 | 69,195 | 69,773 | 72,372 | 67,124 | 66,267 | 64,681 | 283,183 | 270,444 | 258,277
Income (loss) from operations | 5,847 | (13,974) | (12,289) | (5,628) | (9,971) | (14,812) | (7,006) | 6,979 | 6,900 | (1,681) | (42,700) | 5,192 | 24,704 | (12,969) | (5,655) | (9,997) | (13,974) | (7,090) | 6,614 | 6,873 | (1,897) | (42,595) | 4,500 | 25,819
Income (loss) before income taxes | 3,783 | (16,161) | (14,563) | (7,798) | (11,898) | (16,999) | (11,587) | 4,387 | 3,866 | (4,588) | (51,258) | (7,922) | 4,554 | (15,243) | (7,825) | (11,924) | (16,161) | (11,671) | 4,022 | 3,839 | (4,804) | (51,153) | (8,614) | 5,669
Net income (loss) | $ 3,393 | $ (16,660) | $ (14,507) | $ (8,146) | $ (12,268) | $ (17,498) | $ (11,058) | $ 3,914 | $ 3,561 | $ (5,226) | $ (52,419) | $ (8,809) | $ 4,541 | $ (15,187) | $ (8,173) | $ (12,294) | $ (16,660) | $ (11,142) | $ 3,549 | $ 3,534 | $ (5,442) | $ (52,314) | $ (9,501) | $ 5,656

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