Annual report pursuant to Section 13 and 15(d)

Segment Information (Details)

v2.4.0.6
Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Segment Reporting Information [Line Items]                      
Depreciation and Amortization                 $ 1,381 $ 1,076 $ 1,237
Segment information                      
Revenue 10,664 8,928 9,922 10,530 11,334 14,392 20,728 23,201 40,044 69,655 147,849
Gross profit 3,937 3,143 3,448 3,796 4,407 4,263 6,221 8,366 14,324 23,257 41,552
Gross margin                 35.80% 33.40% 28.10%
Operating expenses:                      
Sales and marketing                 7,439 6,496 10,813
Research and development                 7,326 7,727 11,774
General and administrative                 9,910 7,615 8,623
Intangible amortization                 892 548 545
Restructuring                 149 550 0
Goodwill impairment   0 0 0         2,884    
Total operating expenses 9,397 5,921 6,689 6,593 5,650 5,052 5,621 6,613 28,600 22,936 31,755
Operating income (loss)                 (14,276) 321 9,797
Gain on CNS asset sale         0 0 46 31,608   31,654  
Other income (expense), net                 175 331 20
Income tax benefit (expense) (32,823) 1,399 1,059 973 (1,725) 268 1,810 (13,228) (29,392) (12,875) 53,304
Net income (loss) from continuing operations (38,242) (1,336) (2,175) (1,740) (2,838) (452) 2,570 20,151 (43,493) 19,431 63,121
Westell [Member]
                      
Segment Reporting Information [Line Items]                      
Depreciation and Amortization                 1,342 955 809
Segment information                      
Revenue                 38,808 43,629 58,770
Gross profit                 13,325 17,272 25,667
Gross margin                 34.30% 39.60% 43.70%
Operating expenses:                      
Sales and marketing                 7,492 5,573 5,922
Research and development                 5,725 5,117 3,825
General and administrative                 4,401 2,834 2,023
Intangible amortization                 887 544 540
Restructuring                 149 275  
Goodwill impairment                 2,884    
Total operating expenses                 21,538 14,343 12,310
Operating income (loss)                 (8,213) 2,929 13,357
CNS [Member]
                      
Segment Reporting Information [Line Items]                      
Depreciation and Amortization                 39 121 428
Segment information                      
Revenue                 1,236 26,026 89,079
Gross profit                 999 5,985 15,885
Gross margin                 80.80% 23.00% 17.80%
Operating expenses:                      
Sales and marketing                 (53) 923 4,891
Research and development                 1,601 2,610 7,949
General and administrative                 600 976 3,365
Intangible amortization                 5 4 5
Restructuring                   275  
Total operating expenses                 2,153 4,788 16,210
Operating income (loss)                 (1,154) 1,197 (325)
Unallocated [Member]
                      
Operating expenses:                      
General and administrative                 4,909 3,805 3,235
Total operating expenses                 4,909 3,805 3,235
Operating income (loss)                 (4,909) (3,805) (3,235)
Gain on CNS asset sale                   31,654  
Other income (expense), net                 175 331 20
Income tax benefit (expense)                 (29,392) (12,875) 53,304
Net income (loss) from continuing operations                 $ (34,126) $ 15,305 $ 50,089