Annual report pursuant to Section 13 and 15(d)

Basis of Presentation (Details Textual)

v3.3.0.814
Basis of Presentation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Dec. 31, 2012
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Mar. 02, 2014
Apr. 02, 2013
Dec. 31, 2011
Apr. 15, 2011
Business Acquisition [Line Items]                                  
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax                   $ 227 $ (45) $ (2,309)          
Income (loss) from discontinued operations, net of tax benefit (expense) of $(88), $0 and $813 for fiscal years 2015, 2014 and 2013, respectively $ 139       $ (6) $ (29) $ 4 $ (14)   139 (45) (1,496)          
Revenue                   84,127 102,073 38,808          
Selling and Marketing Expense                   12,407 13,304 [1] 6,783 [1]          
Cost of revenue                   57,317 61,612 [1],[2] 26,192 [1]          
Gross profit 4,666 $ 4,395 $ 8,065 $ 9,684 8,090 11,932 12,022 8,417   26,810 40,461 [1],[2] 12,616 [1]          
CostofRevenueAdjustmentUsingPreviousAccountingGuidance                   (900)              
Goodwill 0       31,997 [2],[3]         0 31,997 [2],[3] 0          
Research and Development Expense                   17,348 11,339 5,928          
General and Administrative Expense                   14,678 14,027 9,310          
Intangible amortization                   6,377 4,889 887          
Restructuring 3,188     57 62 38 169 66   3,243 335 149          
Goodwill impairment   20,547 11,450 [3]             31,997 [3]   2,884          
Operating Expenses 17,818 31,978 23,662 [3] 12,592 12,239 9,909 10,728 11,018   86,050 [3] 43,894 [1],[2] 25,941 [1]          
Operating Income (Loss)                   (59,240) [3] (3,433) [2] (13,325)          
Other Nonoperating Income (Expense)                   (2) (56) 175          
Income (loss) before income taxes and discontinued operations (13,170) (27,612) (15,613) [3] (2,847) (4,142) 1,992 1,392 (2,731)   (59,242) [3] (3,489) (13,150)          
Income tax benefit (expense) (31) (72) (69) (29) (8,035) [3] 38 68 19   (201) (7,910) [2],[3] 29,392          
Net income (loss) from continuing operations (13,139) (27,540) (15,544) [3] (2,818) 3,893 [3] 1,954 1,324 (2,750)   (59,041) [3] 4,421 [2],[3] (42,542)          
Net income (loss) $ (13,000) $ (27,540) $ (15,544) [3] $ (2,818) $ 3,887 [3] $ 1,925 $ 1,328 $ (2,764)   $ (58,902) [3] $ 4,376 [2],[3] $ (44,038)          
Basic net income (loss) from continuing operations                   $ (0.98) [3] $ 0.08 [2] $ (0.71)          
Basic net income (loss) from discontinued operations                   0.00 0.00 (0.02)          
Earnings Per Share, Basic $ (0.22) $ (0.46) $ (0.26) [3] $ (0.05) $ 0.07 [3] $ 0.03 $ 0.02 $ (0.05)   $ (0.98) [3] $ 0.07 [2],[3],[4] $ (0.73)          
Liabilities and Equity [3] $ 100,377       $ 162,319 [2]         $ 100,377 $ 162,319 [2]            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent [3]         8,300           8,300            
Kentrox [Member]                                  
Business Acquisition [Line Items]                                  
Business Acquisition, Percentage of Voting Interests Acquired                             100.00%    
Revenue                     46,200            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable                             $ 4,838    
Goodwill                             11,450    
Operating Income (Loss)                     7,300            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent                             1,980    
CSI [Member]                                  
Business Acquisition [Line Items]                                  
Business Acquisition, Percentage of Voting Interests Acquired                           100.00%      
Revenue         3,700         29,500 3,700            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable                           $ 2,912      
Goodwill                           20,547      
Operating Income (Loss)                   (26,900) (400)            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent                           6,293      
CNS [Member]                                  
Business Acquisition [Line Items]                                  
Escrow deposit made                                 $ 3,400
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax                     (45) $ (951)          
Proceeds from CNS asset sale                         $ 36,700        
Litigation Settlement, Amount                 $ 900                
Loss Contingency Accrual, at Carrying Value                         $ 400        
Additional expense related to CNS claim                       500          
ConferencePlus [Member]                                  
Business Acquisition [Line Items]                                  
Sale of conference plus                               $ 40,300  
Escrow deposit made                               $ 4,100  
Loss Contingency, Loss in Period                       1,500          
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax                   227   (1,358)          
Escrow Deposit Released                     2,500 1,600          
Westell [Member] | CNS [Member]                                  
Business Acquisition [Line Items]                                  
Escrow Deposit Released                       2,600          
Westell [Member] | ConferencePlus [Member]                                  
Business Acquisition [Line Items]                                  
Escrow Deposit Released                     3,000            
Arkadin [Member] | ConferencePlus [Member]                                  
Business Acquisition [Line Items]                                  
Escrow Deposit Released                     1,100            
Netgear [Member] | CNS [Member]                                  
Business Acquisition [Line Items]                                  
Escrow Deposit Released                       900          
Restatement Adjustment [Member]                                  
Business Acquisition [Line Items]                                  
Income (loss) from discontinued operations, net of tax benefit (expense) of $(88), $0 and $813 for fiscal years 2015, 2014 and 2013, respectively                   0 0            
Revenue                   0 0            
Selling and Marketing Expense                   0 0 (709) [1]          
Cost of revenue                   0 0 709 [1]          
Gross profit                   0 0 $ (709) [1]          
Goodwill 0       895         0 895            
Research and Development Expense                   0 0            
General and Administrative Expense                   0 0            
Intangible amortization                   0 0            
Restructuring                   0 0            
Goodwill impairment     $ 895             895              
Operating Expenses                   895 0            
Operating Income (Loss)                   (895) 0            
Other Nonoperating Income (Expense)                   0 0            
Income (loss) before income taxes and discontinued operations                   (895) 0            
Income tax benefit (expense)         550 $ 0 $ 0 $ 0   0 550 [3]            
Net income (loss) from continuing operations                   (895) (550)            
Net income (loss)                   $ (895) $ (550) [3]            
Basic net income (loss) from continuing operations                   $ (0.01) $ (0.01)            
Basic net income (loss) from discontinued operations                   0.00 0.00            
Earnings Per Share, Basic                   $ (0.01) $ (0.01)            
Liabilities and Equity $ 70       $ 1,445         $ 70 $ 1,445            
Restatement Adjustment [Member] | Kentrox [Member]                                  
Business Acquisition [Line Items]                                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable                             1,445    
Goodwill                             895    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent                             $ (550)    
Restatement Adjustment [Member] | CSI [Member]                                  
Business Acquisition [Line Items]                                  
Cost of revenue [2]                     138            
Gross profit [2]                     (138)            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable [5]                           37      
Goodwill                           405      
Intangible amortization [2]                     (19)            
Income tax benefit (expense) [2]                     322            
Net income (loss)                     $ (441)            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent [6]                           $ (323)      
[1] Certain amounts have been reclassified to reflect a change in accounting principle (see Note 1).
[2] Certain amounts have been adjusted to reflect measurement period adjustments related to the CSI acquisition (see Note 2).
[3] See Note 1 for restatement information.
[4] Sums may not total due to rounding.
[5] Other measurement period adjustments mostly related to inventory adjustments.
[6] Intangible asset fair value adjustment for trade name and related tax effect.