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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Sep. 30, 2012
Current assets:    
Cash and cash equivalents $ 52,010 $ 60,246
Marketable securities 49,512 58,372
Accounts receivable, net 24,704 24,634
Inventories 25,360 24,435
Deferred tax assets 3,449 3,389
Other 3,562 2,493
Total current assets 158,597 173,569
Marketable securities, long-term 3,278 2,016
Property, equipment and improvements, net 15,534 15,157
Identifiable intangible assets, net 13,021 10,629
Goodwill 103,391 86,209
Deferred tax assets 4,158 5,010
Other 498 494
Total assets 298,477 293,084
Current liabilities:    
Accounts payable 8,469 6,040
Income taxes payable 0 1,269
Accrued compensation 5,780 5,744
Accrued warranty 935 1,021
Accrued professional fees 986 695
Other 2,826 3,423
Total current liabilities 18,996 18,192
Income taxes payable 3,128 3,294
Deferred tax liabilities 576 630
Other noncurrent liabilities 107 111
Total liabilities 22,807 22,227
Contingencies (see Note 10)      
Stockholders' equity:    
Preferred stock, $.01 par value; 2,000,000 shares authorized; none issued and outstanding 0 0
Common stock, $.01 par value; 60,000,000 shares authorized; 30,012,791 and 29,268,788 shares issued 300 293
Additional paid-in capital 207,441 199,495
Retained earnings 111,513 110,283
Accumulated other comprehensive loss (14,013) (13,725)
Treasury stock, at cost, 3,783,529 and 3,356,453 shares (29,571) (25,489)
Total stockholders' equity 275,670 270,857
Total liabilities and stockholders' equity $ 298,477 $ 293,084