| Product Warranties (Details Textual) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 3 Months Ended | |||
|---|---|---|---|---|---|
| Sep. 30, 2012 | Jun. 30, 2013 | Mar. 31, 2013 | Jun. 30, 2013
 Westell [Member]
 Maximum [Member] | Jun. 30, 2013
 Kentrox [Member] | |
| Product Warranties (Textual) [Abstract] | |||||
| Standard Product Warranty Description | P7Y | P1Y | |||
| Current portions of warranty reserve | $ 157 | $ 94 | |||
| Non-current portions of the warranty reserve | 57 | 58 | |||
| Specific pre-acquisition ANTONE product warranty in excess of acquired limit | 303 | ||||
| ANTONEStandardProductWarrantyAccrual | 2 | ||||
| Indemnification related to warranty claims | $ 303 | ||||
| X | ||||||||||
| 
- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid within one year or the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid after one year or beyond the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Describes the nature of the product warranty, including the approximate term of the product warranty, how the product warranty arose, and the events or circumstances that would require the warrantor to perform under the product warranty. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 | 
| X | ||||||||||
| 
- Definition ANTONE Standard Product Warranty Accrual No definition available. 
 | 
| X | ||||||||||
| 
- Definition indemnification asset No definition available. 
 | 
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Definition Specific pre acquisition product warranty accrual additions. No definition available. 
 |