Annual report pursuant to Section 13 and 15(d)

Acquisitions Acquisitions (Details Textual)

v2.4.0.8
Acquisitions Acquisitions (Details Textual) (USD $)
12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2014
CSI [Member]
Mar. 31, 2013
CSI [Member]
Mar. 31, 2012
CSI [Member]
Mar. 31, 2014
Kentrox [Member]
Mar. 31, 2013
Kentrox [Member]
Mar. 31, 2012
Kentrox [Member]
Mar. 31, 2014
CSI [Member]
Mar. 31, 2014
CSI [Member]
Mar. 02, 2014
CSI [Member]
Mar. 31, 2014
CSI [Member]
Product Technology [Member]
Mar. 02, 2014
CSI [Member]
Product Technology [Member]
Mar. 31, 2014
CSI [Member]
Customer Relationships [Member]
Mar. 02, 2014
CSI [Member]
Customer Relationships [Member]
Mar. 31, 2013
Kentrox [Member]
Mar. 31, 2014
Kentrox [Member]
Mar. 31, 2013
Kentrox [Member]
Apr. 02, 2013
Kentrox [Member]
Mar. 31, 2014
Kentrox [Member]
Product Technology [Member]
Apr. 02, 2013
Kentrox [Member]
Product Technology [Member]
Mar. 31, 2014
Kentrox [Member]
Customer Relationships [Member]
Apr. 02, 2013
Kentrox [Member]
Customer Relationships [Member]
Apr. 02, 2013
Kentrox [Member]
Scenario, Adjustment [Member]
Mar. 31, 2014
Antone Wireless Corporation [Member]
Mar. 31, 2013
Antone Wireless Corporation [Member]
May 15, 2012
Antone Wireless Corporation [Member]
Mar. 31, 2014
Antone Wireless Corporation [Member]
Product Technology [Member]
May 15, 2012
Antone Wireless Corporation [Member]
Product Technology [Member]
Mar. 31, 2014
Antone Wireless Corporation [Member]
Customer Relationships [Member]
May 15, 2012
Antone Wireless Corporation [Member]
Customer Relationships [Member]
Business Acquisition [Line Items]                                                                
Business Acquisition, Percentage of Voting Interests Acquired                       100.00%               100.00%                        
Payments to Acquire Businesses, Gross                     $ 39,000,000             $ 30,000,000                 $ 2,500,000          
Working Capital Adjustment                       4,700,000               1,300,000                        
Business Combination, Acquisition Related Costs                   200,000             300,000                   100,000          
Revenue 102,073,000 38,808,000 43,629,000 3,676,000     46,174,000                                                  
Operating Income (Loss) (3,314,000) (13,325,000) (1,947,000)               (300,000)               7,300,000                          
Goodwill 30,697,000 0 801,000 20,142,000       10,555,000           20,142,000               10,555,000         2,584,000     2,086,000        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High 3,500,000 3,500,000                                                   3,500,000        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill                       16,230,000   3,860,000   10,980,000       15,980,000   4,410,000   8,960,000 (990,000)     3,230,000   2,800,000   400,000
Finite-Lived Intangible Asset, Useful Life                         3 years   7 years           9 years   10 years           8 years   8 years  
Specific pre-acquisition ANTONE product warranty in excess of acquired limit    303,000                                                 300,000          
Pre Acquisition Warranty Costs                                                   $ 25,000