RESTATEMENT - Consolidated Balance Sheets (Details) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Apr. 02, 2016 |
Mar. 31, 2016 |
Current Assets |
|
|
|
|
|
|
|
|
|
|
|
Cash and cash equivalents |
$ 10,790
|
$ 10,926
|
$ 5,704
|
$ 10,227
|
$ 10,865
|
$ 10,309
|
$ 13,983
|
$ 8,661
|
$ 12,958
|
|
|
Accounts receivable, net of allowance for doubtful accounts of $16 as of March 31, 2017 |
86,828
|
79,571
|
76,304
|
81,427
|
96,350
|
96,156
|
99,226
|
97,508
|
101,946
|
|
|
Manufacturing inventories |
18,440
|
15,563
|
21,084
|
30,666
|
34,428
|
35,461
|
34,712
|
36,686
|
36,274
|
|
|
Service part inventories |
19,070
|
18,551
|
18,642
|
19,397
|
21,889
|
19,061
|
19,915
|
19,788
|
19,849
|
|
|
Other current assets |
18,095
|
7,877
|
11,291
|
11,348
|
13,565
|
8,335
|
9,581
|
9,760
|
9,183
|
|
|
Restricted cash |
1,065
|
1,098
|
6,124
|
1,220
|
1,342
|
3,054
|
3,063
|
3,002
|
2,954
|
|
|
Total current assets |
154,288
|
133,586
|
139,149
|
154,285
|
178,439
|
172,376
|
180,480
|
175,405
|
183,164
|
|
|
Property and equipment, less accumulated depreciation |
8,437
|
8,773
|
8,925
|
9,361
|
9,698
|
10,226
|
10,420
|
10,137
|
10,876
|
|
|
Intangible assets, less accumulated amortization |
34
|
60
|
86
|
112
|
138
|
164
|
204
|
240
|
276
|
|
|
Restricted cash, long-term |
5,000
|
5,000
|
0
|
5,000
|
5,000
|
12,000
|
20,000
|
20,000
|
20,000
|
|
|
Other long term assets |
5,112
|
7,572
|
6,034
|
8,500
|
9,364
|
8,663
|
6,546
|
6,305
|
6,926
|
|
|
Total assets |
172,871
|
154,991
|
154,194
|
177,258
|
202,639
|
203,429
|
217,650
|
212,087
|
221,242
|
|
|
Current liabilities: |
|
|
|
|
|
|
|
|
|
|
|
Accounts payable |
37,395
|
38,774
|
45,021
|
51,601
|
62,646
|
57,142
|
48,488
|
44,494
|
40,826
|
|
|
Accrued warranty |
3,456
|
|
|
|
2,422
|
|
0
|
0
|
3,689
|
$ 3,448
|
|
Deferred revenue, current |
90,407
|
84,879
|
89,020
|
94,063
|
96,866
|
87,388
|
88,505
|
90,456
|
92,325
|
|
|
Accrued restructuring charges, current |
2,876
|
3,947
|
4,437
|
2,681
|
3,166
|
5,086
|
2,370
|
2,878
|
1,894
|
|
|
Convertible subordinated debt, current |
|
0
|
0
|
0
|
|
0
|
57,034
|
62,926
|
62,827
|
|
|
Accrued compensation |
17,117
|
14,705
|
15,559
|
15,182
|
19,460
|
20,144
|
22,255
|
21,218
|
23,789
|
|
|
Other accrued liabilities |
29,025
|
25,295
|
29,150
|
23,114
|
17,638
|
19,024
|
16,561
|
17,344
|
15,945
|
|
|
Total current liabilities |
178,470
|
169,100
|
310,701
|
195,641
|
207,276
|
188,784
|
235,213
|
239,316
|
237,606
|
|
|
Deferred revenue, long-term |
36,733
|
34,361
|
34,577
|
36,520
|
38,587
|
35,824
|
36,774
|
38,149
|
38,896
|
|
|
Accrued restructuring charges, long-term |
0
|
0
|
0
|
2,432
|
2,653
|
3,098
|
3,615
|
4,045
|
4,388
|
|
|
Long-term debt, net of current portion |
145,621
|
1,500
|
127,514
|
9,000
|
115,986
|
0
|
76,491
|
61,734
|
66,676
|
|
|
Other long-term liabilities |
11,827
|
10,695
|
10,564
|
11,823
|
11,604
|
11,126
|
11,036
|
10,402
|
12,972
|
|
|
Total liabilities |
372,651
|
351,229
|
355,842
|
358,671
|
376,106
|
356,133
|
363,129
|
353,646
|
360,538
|
|
|
Commitment and contingencies (Note 11) |
|
|
|
|
|
|
|
|
|
|
|
Preferred stock: |
|
|
|
|
|
|
|
|
|
|
|
Preferred stock 20,000 shares authorized; no shares issued as of March 31, 2017 |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
|
|
Common stock: |
|
|
|
|
|
|
|
|
|
|
|
Common stock, $0.01 par value; 1,000,000 shares authorized; 34,063 shares issued and outstanding at March 31, 2017 |
360
|
358
|
358
|
356
|
354
|
351
|
347
|
341
|
340
|
|
|
Additional paid-in capital |
|
493,347
|
483,494
|
482,028
|
|
479,289
|
476,093
|
475,357
|
473,850
|
|
|
Accumulated deficit |
(697,954)
|
(688,543)
|
(684,257)
|
(662,640)
|
(655,157)
|
(631,224)
|
(621,028)
|
(615,930)
|
(611,811)
|
|
|
Accumulated other comprehensive income |
(1,410)
|
(1,400)
|
(1,243)
|
(1,157)
|
(274)
|
(1,120)
|
(891)
|
(1,327)
|
(1,675)
|
|
|
Total stockholders' deficit |
(199,780)
|
(196,238)
|
(201,648)
|
(181,413)
|
(173,467)
|
(152,704)
|
(145,479)
|
(141,559)
|
(139,296)
|
|
$ (143,098)
|
Total liabilities and stockholders' deficit |
$ 172,871
|
$ 154,991
|
$ 154,194
|
$ 177,258
|
$ 202,639
|
$ 203,429
|
217,650
|
212,087
|
221,242
|
|
|
Previously Reported [Member] |
|
|
|
|
|
|
|
|
|
|
|
Current Assets |
|
|
|
|
|
|
|
|
|
|
|
Cash and cash equivalents |
|
|
|
|
|
|
9,504
|
8,661
|
12,958
|
|
|
Accounts receivable, net of allowance for doubtful accounts of $16 as of March 31, 2017 |
|
|
|
|
|
|
105,771
|
109,418
|
116,056
|
|
|
Manufacturing inventories |
|
|
|
|
|
|
29,119
|
27,821
|
27,661
|
|
|
Service part inventories |
|
|
|
|
|
|
19,915
|
19,788
|
19,849
|
|
|
Other current assets |
|
|
|
|
|
|
8,795
|
10,005
|
9,969
|
|
|
Restricted cash |
|
|
|
|
|
|
1,969
|
1,891
|
1,832
|
|
|
Total current assets |
|
|
|
|
|
|
175,073
|
177,584
|
188,325
|
|
|
Property and equipment, less accumulated depreciation |
|
|
|
|
|
|
10,745
|
10,455
|
11,186
|
|
|
Intangible assets, less accumulated amortization |
|
|
|
|
|
|
204
|
240
|
276
|
|
|
Restricted cash, long-term |
|
|
|
|
|
|
20,000
|
20,000
|
20,000
|
|
|
Other long term assets |
|
|
|
|
|
|
5,127
|
4,753
|
5,240
|
|
|
Total assets |
|
|
|
|
|
|
211,149
|
213,032
|
225,027
|
|
|
Current liabilities: |
|
|
|
|
|
|
|
|
|
|
|
Accounts payable |
|
|
|
|
|
|
48,488
|
45,007
|
41,611
|
|
|
Accrued warranty |
|
|
|
|
|
|
2,950
|
3,161
|
3,263
|
|
|
Deferred revenue, current |
|
|
|
|
|
|
77,090
|
79,996
|
84,683
|
|
|
Accrued restructuring charges, current |
|
|
|
|
|
|
1,743
|
2,249
|
869
|
|
|
Convertible subordinated debt, current |
|
|
|
|
|
|
57,034
|
62,926
|
62,827
|
|
|
Accrued compensation |
|
|
|
|
|
|
23,179
|
22,186
|
24,104
|
|
|
Other accrued liabilities |
|
|
|
|
|
|
12,927
|
13,309
|
12,998
|
|
|
Total current liabilities |
|
|
|
|
|
|
223,411
|
228,834
|
230,355
|
|
|
Deferred revenue, long-term |
|
|
|
|
|
|
35,906
|
36,697
|
37,642
|
|
|
Accrued restructuring charges, long-term |
|
|
|
|
|
|
423
|
544
|
481
|
|
|
Long-term debt, net of current portion |
|
|
|
|
|
|
70,631
|
60,219
|
65,028
|
|
|
Other long-term liabilities |
|
|
|
|
|
|
5,112
|
4,736
|
7,520
|
|
|
Total liabilities |
|
|
|
|
|
|
335,483
|
331,030
|
341,026
|
|
|
Commitment and contingencies (Note 11) |
|
|
|
|
|
|
|
|
|
|
|
Preferred stock: |
|
|
|
|
|
|
|
|
|
|
|
Preferred stock 20,000 shares authorized; no shares issued as of March 31, 2017 |
|
|
|
|
|
|
0
|
0
|
0
|
|
|
Common stock: |
|
|
|
|
|
|
|
|
|
|
|
Common stock, $0.01 par value; 1,000,000 shares authorized; 34,063 shares issued and outstanding at March 31, 2017 |
|
|
|
|
|
|
347
|
341
|
340
|
|
|
Additional paid-in capital |
|
|
|
|
|
|
476,409
|
475,357
|
473,850
|
|
|
Accumulated deficit |
|
|
|
|
|
|
(604,832)
|
(596,969)
|
(593,295)
|
|
|
Accumulated other comprehensive income |
|
|
|
|
|
|
3,742
|
3,273
|
3,106
|
|
|
Total stockholders' deficit |
|
|
|
|
|
|
(124,334)
|
(117,998)
|
(115,999)
|
|
$ (125,885)
|
Total liabilities and stockholders' deficit |
|
|
|
|
|
|
211,149
|
213,032
|
225,027
|
|
|
Restatement Adjustment [Member] |
|
|
|
|
|
|
|
|
|
|
|
Current Assets |
|
|
|
|
|
|
|
|
|
|
|
Cash and cash equivalents |
|
|
|
|
|
|
4,479
|
0
|
|
|
|
Accounts receivable, net of allowance for doubtful accounts of $16 as of March 31, 2017 |
|
|
|
|
|
|
(6,545)
|
(11,910)
|
(14,110)
|
|
|
Manufacturing inventories |
|
|
|
|
|
|
5,593
|
8,865
|
8,613
|
|
|
Service part inventories |
|
|
|
|
|
|
0
|
0
|
|
|
|
Other current assets |
|
|
|
|
|
|
786
|
(245)
|
(786)
|
|
|
Restricted cash |
|
|
|
|
|
|
1,094
|
1,111
|
1,122
|
|
|
Total current assets |
|
|
|
|
|
|
5,407
|
(2,179)
|
(5,161)
|
|
|
Property and equipment, less accumulated depreciation |
|
|
|
|
|
|
(325)
|
(318)
|
(310)
|
|
|
Intangible assets, less accumulated amortization |
|
|
|
|
|
|
0
|
0
|
|
|
|
Restricted cash, long-term |
|
|
|
|
|
|
0
|
0
|
|
|
|
Other long term assets |
|
|
|
|
|
|
1,419
|
1,552
|
1,686
|
|
|
Total assets |
|
|
|
|
|
|
6,501
|
(945)
|
(3,785)
|
|
|
Current liabilities: |
|
|
|
|
|
|
|
|
|
|
|
Accounts payable |
|
|
|
|
|
|
0
|
(513)
|
(785)
|
|
|
Accrued warranty |
|
|
|
|
|
|
(2,950)
|
(3,161)
|
(3,263)
|
|
|
Deferred revenue, current |
|
|
|
|
|
|
11,415
|
10,460
|
7,642
|
|
|
Accrued restructuring charges, current |
|
|
|
|
|
|
627
|
629
|
1,025
|
|
|
Convertible subordinated debt, current |
|
|
|
|
|
|
0
|
0
|
|
|
|
Accrued compensation |
|
|
|
|
|
|
(924)
|
(968)
|
(315)
|
|
|
Other accrued liabilities |
|
|
|
|
|
|
3,634
|
4,035
|
2,947
|
|
|
Total current liabilities |
|
|
|
|
|
|
11,802
|
10,482
|
7,251
|
|
|
Deferred revenue, long-term |
|
|
|
|
|
|
868
|
1,452
|
1,254
|
|
|
Accrued restructuring charges, long-term |
|
|
|
|
|
|
3,192
|
3,501
|
3,907
|
|
|
Long-term debt, net of current portion |
|
|
|
|
|
|
5,860
|
1,515
|
1,648
|
|
|
Other long-term liabilities |
|
|
|
|
|
|
5,924
|
5,666
|
5,452
|
|
|
Total liabilities |
|
|
|
|
|
|
27,646
|
22,616
|
19,512
|
|
|
Commitment and contingencies (Note 11) |
|
|
|
|
|
|
|
|
|
|
|
Preferred stock: |
|
|
|
|
|
|
|
|
|
|
|
Preferred stock 20,000 shares authorized; no shares issued as of March 31, 2017 |
|
|
|
|
|
|
0
|
0
|
0
|
|
|
Common stock: |
|
|
|
|
|
|
|
|
|
|
|
Common stock, $0.01 par value; 1,000,000 shares authorized; 34,063 shares issued and outstanding at March 31, 2017 |
|
|
|
|
|
|
0
|
0
|
0
|
|
|
Additional paid-in capital |
|
|
|
|
|
|
(316)
|
0
|
|
|
|
Accumulated deficit |
|
|
|
|
|
|
(16,196)
|
(18,961)
|
(18,516)
|
|
|
Accumulated other comprehensive income |
|
|
|
|
|
|
(4,633)
|
(4,600)
|
(4,781)
|
|
|
Total stockholders' deficit |
|
|
|
|
|
|
21,145
|
(23,561)
|
(23,297)
|
|
|
Total liabilities and stockholders' deficit |
|
|
|
|
|
|
$ 6,501
|
$ (945)
|
$ (3,785)
|
|
|