the company has no long-term debt or material commitments at march 31 , 2006 other than those shown in the table above . in may 2005 , the company acquired all the shares of outstanding capital stock of impella cardiosystems , a company headquartered in aachen , germany . the aggregate purchase price was approximately $ 45.1 million , which consisted of $ 42.2 million of our common stock , $ 1.6 million of cash paid to certain former shareholders of impella , and $ 1