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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 81,990 $ 97,699
Marketable securities 13,757  
Accounts receivable, net of allowances of $82 and $117, respectively 40,308 29,289
Inventories 45,379 52,260
Inventories-delivered systems 1,850 1,637
Prepaid expenses and other 10,056 8,119
Deferred income tax assets 9,277 12,406
Total current assets 202,617 201,410
Property, plant and equipment, net 42,203 35,521
Goodwill 10,796 11,990
Intangible assets, net 12,229 14,394
Deferred income tax assets 4,927 2,864
Other assets 866 1,042
Total assets 273,638 267,221
Current liabilities:    
Accounts payable 8,988 7,975
Accrued payroll and related expenses 6,967 8,837
Deferred revenue 9,245 5,788
Other current liabilities 14,382 16,709
Income taxes payable 337 707
Current portion of debt obligations 790 765
Total current liabilities 40,709 40,781
Deferred revenue 5,296 4,547
Income taxes payable 2,430 2,401
Other long-term liabilities 2,078 2,813
Debt obligations 6,349 6,687
Total liabilities 56,862 57,229
Commitments and contingencies (Note 15)      
Stockholders' equity:    
Preferred stock, $0.001 par value; 3,000,000 shares authorized; no shares issued or outstanding      
Common stock, $0.001 par value, 47,000,000 shares authorized; 23,189,435 and 23,182,771, respectively, issued and outstanding 23 23
Additional paid-in capital 238,232 236,735
Accumulated deficit (22,106) (28,315)
Accumulated other comprehensive income 627 1,549
Total stockholders' equity 216,776 209,992
Total liabilities and stockholders' equity $ 273,638 $ 267,221