Annual report pursuant to Section 13 and 15(d)

QUARTERLY FINANCIAL DATA (UNAUDITED) - Schedule of Quarterly Consolidated Statement Of Operations (Details)

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QUARTERLY FINANCIAL DATA (UNAUDITED) - Schedule of Quarterly Consolidated Statement Of Operations (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Feb. 01, 2018
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Revenue                                  
Revenue   $ 103,277 $ 101,979 $ 89,912 $ 107,512 $ 95,309 $ 115,994 $ 111,786 $ 114,595 $ 197,424 $ 226,381 $ 226,381 $ 299,403 $ 342,375 $ 402,680 $ 437,684 $ 493,054
COSTS AND EXPENSES:                                  
Cost of Revenue   60,611 58,897 54,385 61,173 59,642 73,034 66,467 65,757 115,558 132,224 132,224 174,455 205,258 235,066 264,900 287,782
Gross profit   42,666 43,082 35,527 46,339 35,667 42,960 45,319 48,838 81,866 94,157 94,157 124,948 137,117 167,614 172,784 205,272
Operating expense                                  
Research and development   8,083 7,907 7,862 8,261 8,605 9,162 10,190 10,605 16,123 20,795 20,795 24,030 29,957 32,113 38,562 44,379
Sales and marketing   16,603 16,990 16,682 19,125 22,629 26,711 25,824 27,078 35,807 52,902 52,902 52,797 79,613 69,400 102,242 100,527
General and administrative   18,333 13,481 14,072 19,391 15,782 12,416 11,506 12,424 33,463 23,930 23,930 46,944 36,346 65,277 52,128 51,590
Restructuring charges   142 1,227 294 3,907 2,534 4,239 70 1,631 4,201 1,701 1,701 5,428 5,940      
Total operating expenses   43,161 39,605 38,910 50,684 49,550 52,528 47,590 51,738 89,594 99,328 99,328 129,199 151,856 172,360 201,406 198,591
TOTAL COSTS AND EXPENSES   103,772 98,502 93,295 111,857     114,057   205,152     303,654        
INCOME / (LOSS) FROM OPERATIONS   (495) 3,477 (3,383) (4,345) (13,883) (9,568) (2,271) (2,900) (7,728) (5,171) (5,171) (4,251) (14,739) (4,746) (28,622) 6,681
OTHER EXPENSES AND LOSSES, NET:                                  
Interest expense   6,286 6,238 4,636 3,935 3,485 2,968 2,638 2,579 8,571 5,217 5,217 14,809 8,185 21,095 11,670 7,993
(Gain) loss on debt extinguishment $ (800) 0 5,033 12,425 0 6,895 0 39 0 12,425 39 39 17,458 39 17,458 6,934 41
Other expenses (income)   992 (3,846) 196 (220) (382) (210) (77) (98) (24) (175) (175) (3,870) (385) (2,878) (767) (601)
INCOME / NET (LOSS) BEFORE INCOME TAXES   (7,773) (3,948) (20,640) (8,060) (23,881) (12,326) (4,871) (5,381) (28,700) (10,252) (10,252) (32,648) (22,578) (40,421) (46,459) (752)
Income tax expense (benefit)   1,637 337 977 (575) 48 (2,127) 228 (1,262) 402 (1,034) (1,034) 739 (3,161) 2,376 (3,113) 1,656
Net loss   $ (9,410) $ (4,285) $ (21,617) $ (7,485) $ (23,929) $ (10,199) $ (5,099) $ (4,119) $ (29,103) $ (9,218) $ (9,218) $ (33,387) $ (19,417) $ (42,797) $ (43,346) $ (2,408)
Net Loss Per Share                                  
Basic               $ (0.15) $ (0.12)   $ (0.27)       $ (1.20) $ (1.25) $ (0.07)
Diluted   $ (0.26) $ (0.12) $ (0.61) $ (0.21) $ (0.68) $ (0.29) $ (0.15) $ (0.12) $ (0.82) $ (0.27) $ (0.27) $ (0.94) $ (0.56) (1.20) (1.25) $ (0.07)
Weighted average common shares outstanding - basic               34,580 34,093   34,338           33,742
Weighted average common shares outstanding - diluted               34,580 34,093   34,338           33,742
Earnings Per Share, Basic and Diluted   $ (0.26) $ (0.12) $ (0.61) $ (0.21) $ (0.68) $ (0.29) $ (0.15) $ (0.12) $ (0.82)   $ (0.27) $ (0.94) $ (0.56) $ (1.20) $ (1.25) $ (0.07)
Weighted Average Number of Shares Outstanding, Basic and Diluted   35,710 35,552 35,502 35,444 35,263 34,820 34,580 34,093 35,473   34,338 35,500 34,499 35,551 34,687 33,742
As Reported                                  
Revenue                                  
Revenue               $ 107,051 $ 116,859   $ 223,909           $ 505,345
COSTS AND EXPENSES:                                  
Cost of Revenue               63,278 66,039   129,317           291,921
Gross profit               43,773 50,820   94,592           213,424
Operating expense                                  
Research and development               10,190 10,605   20,795           44,379
Sales and marketing               26,179 27,824   54,003           103,235
General and administrative               12,158 12,509   24,667           51,599
Restructuring charges               31 2,335   2,366            
Total operating expenses               48,558 53,273   101,831           201,276
TOTAL COSTS AND EXPENSES               111,836                  
INCOME / (LOSS) FROM OPERATIONS               (4,785) (2,453)   (7,239)           12,148
OTHER EXPENSES AND LOSSES, NET:                                  
Interest expense               2,617 2,558   5,175           7,912
(Gain) loss on debt extinguishment               39     39           41
Other expenses (income)               (77) (98)   (175)           (562)
INCOME / NET (LOSS) BEFORE INCOME TAXES               (7,364) (4,913)   (12,278)           4,757
Income tax expense (benefit)               499 (1,240)   (741)           1,112
Net loss               $ (7,863) $ (3,673)   $ (11,537)           $ 3,645
Net Loss Per Share                                  
Basic               $ (0.23) $ (0.11)   $ (0.34)           $ 0.11
Diluted               $ (0.23) $ (0.11)   $ (0.34)           $ 0.11
Weighted average common shares outstanding - basic               34,580 34,093   34,338           33,742
Weighted average common shares outstanding - diluted               34,580 34,093   34,338           34,113
Restatement Adjustments                                  
Revenue                                  
Revenue               $ 4,735 $ (2,264)   $ 2,472           $ (12,291)
COSTS AND EXPENSES:                                  
Cost of Revenue               3,189 (282)   2,907           (4,139)
Gross profit               1,546 (1,982)   (435)           (8,152)
Operating expense                                  
Research and development               0 0   0            
Sales and marketing               (355) (746)   (1,101)           (2,708)
General and administrative               (652) (85)   (737)           (9)
Restructuring charges               39 (704)   (665)            
Total operating expenses               (968) (1,535)   (2,503)           (2,685)
TOTAL COSTS AND EXPENSES               2,221                  
INCOME / (LOSS) FROM OPERATIONS               2,514 (447)   2,068           (5,467)
OTHER EXPENSES AND LOSSES, NET:                                  
Interest expense               21 21   42           81
(Gain) loss on debt extinguishment               0     0            
Other expenses (income)               0 0   0           (39)
INCOME / NET (LOSS) BEFORE INCOME TAXES               2,493 (468)   2,026           (5,509)
Income tax expense (benefit)               (271) (22)   (293)           544
Net loss               2,764 (444)   2,319           (6,053)
Product                                  
Revenue                                  
Revenue   $ 63,177 $ 62,986 $ 51,622 $ 66,869 $ 56,160 $ 75,343 67,596 69,483 $ 118,491 137,079 $ 137,079 $ 181,477 $ 212,422 $ 244,654 $ 268,582 308,318
COSTS AND EXPENSES:                                  
Cost of Revenue   47,270 45,819 41,319 45,438 45,710 58,119 51,602 50,680 86,757 102,282 102,282 132,576 160,401 179,846 206,111 226,660
Product | As Reported                                  
Revenue                                  
Revenue               63,606 71,618   135,224           322,212
COSTS AND EXPENSES:                                  
Cost of Revenue               48,561 50,949   99,510           231,207
Product | Restatement Adjustments                                  
Revenue                                  
Revenue               3,990 (2,135)   1,855           (13,894)
COSTS AND EXPENSES:                                  
Cost of Revenue               3,041 (269)   2,772           (4,547)
Service                                  
Revenue                                  
Revenue   33,683 34,097 33,352 33,564 31,621 34,875 34,910 35,117 66,916 70,027 70,027 101,013 104,902 134,696 136,523 145,938
COSTS AND EXPENSES:                                  
Cost of Revenue   13,341 13,078 13,066 15,735 13,932 14,915 14,865 15,077 28,801 29,942 29,942 41,879 44,857 55,220 58,789 61,122
Service | As Reported                                  
Revenue                                  
Revenue               34,165 35,246   69,410           144,335
COSTS AND EXPENSES:                                  
Cost of Revenue               14,717 15,090   29,807           60,714
Service | Restatement Adjustments                                  
Revenue                                  
Revenue               745 (129)   617           1,603
COSTS AND EXPENSES:                                  
Cost of Revenue               148 (13)   135           408
Royalty                                  
Revenue                                  
Revenue   $ 6,417 $ 4,896 $ 4,938 $ 7,079 $ 7,528 $ 5,776 9,280 9,995 $ 12,017 19,275 $ 19,275 $ 16,913 $ 25,051 $ 23,330 $ 32,579 38,798
COSTS AND EXPENSES:                                  
Cost of Revenue               66,467 65,757                
Royalty | As Reported                                  
Revenue                                  
Revenue               9,280 9,995   19,275           $ 38,798
Royalty | Restatement Adjustments                                  
Revenue                                  
Revenue               $ 0 $ 0   $ 0