Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Revenues $ 7,994 $ 9,074
Cost of goods sold 4,365 4,555
Gross profit 3,629 4,519
Other expenses:    
Sales and marketing 1,242 1,062
General and administrative 1,950 1,434
Research and development 606 499
Interest expense, net 545 599
Interest expense - related party 10 17
Amortization of intangible assets 477 402
Change in fair value of contingent consideration 317  
Other expenses, net 4 53
Total other expenses 5,151 4,066
Income (loss) before income taxes (1,522) 453
Provision for (benefit from) income taxes (533) 181
Net income (loss) (989) 272
Other comprehensive income, net of tax:    
Foreign currency translation adjustments 183 437
Unrealized gain on cash flow hedges, net of taxes of $(7) and $(19), respectively 9 34
Other comprehensive income 192 471
Comprehensive income (loss) $ (797) $ 743
Net income (loss) per common share:    
Basic $ (0.05) $ 0.02
Diluted $ (0.05) $ 0.00
Weighted average shares used to compute net income (loss) per common share:    
Basic 18,172,694 15,752,302
Diluted 18,172,694 19,545,963