Line Of Credit	12 Months Ended
Dec. 31, 2011
Line Of Credit
Line Of Credit	10. Line of Credit On May 23, 2011, the Company renewed and extended the term of its Credit Agreement (the "Credit Agreement") with Silicon Valley Bank ("SVB"), U.S. Bank National Association, and Bank of America, N.A. The Credit Agreement provides for revolving credit borrowings up to a maximum principal amount of $50.0 million, subject to a commitment increase of $25.0 million. The Credit Agreement also allows for the issuance of letters of credit in the aggregate amount of up to $500,000 at any one time; outstanding letters of credit reduce the credit available for revolving credit borrowings. Substantially all of the Company's assets are pledged to secure the credit facility. All outstanding amounts owed under the Credit Agreement become due and payable no later than the final maturity date of May 23, 2015. Borrowings under the credit facility bear interest at the Company's option of SVB's prime rate (4.00% on December 31, 2011) plus a margin ranging from 0.00% to 0.50% or one-month LIBOR (0.295% on December 31, 2011) plus a margin ranging from 2.50% to 3.00%. The additional margin amount is dependent on the level of outstanding borrowings. As of December 31, 2011, the Company had $50.0 million of maximum borrowing capacity. An annual commitment fee of 0.30% is incurred on the unused portion of the line of credit. The Company is required to comply with various financial covenants under the Credit Agreement. Specifically, the Company is required to maintain a ratio of earnings before interest, taxes, depreciation, and amortization ("EBITDA") plus stock compensation and minus income taxes paid and capital expenditures to interest expense and scheduled payments due for borrowings on a trailing three months basis annualized of not less than 2.00 to 1.00 and a ratio of current maturities of long-term debt to EBITDA plus stock compensation and minus income taxes paid and capital expenditures of not more than 2.75 to 1.00.

10. Line of Credit

On May 23, 2011, the Company renewed and extended the term of its Credit Agreement (the "Credit Agreement") with Silicon Valley Bank ("SVB"), U.S. Bank National Association, and Bank of America, N.A. The Credit Agreement provides for revolving credit borrowings up to a maximum principal amount of $50.0 million, subject to a commitment increase of $25.0 million. The Credit Agreement also allows for the issuance of letters of credit in the aggregate amount of up to $500,000 at any one time; outstanding letters of credit reduce the credit available for revolving credit borrowings. Substantially all of the Company's assets are pledged to secure the credit facility.

All outstanding amounts owed under the Credit Agreement become due and payable no later than the final maturity date of May 23, 2015. Borrowings under the credit facility bear interest at the Company's option of SVB's prime rate (4.00% on December 31, 2011) plus a margin ranging from 0.00% to 0.50% or one-month LIBOR (0.295% on December 31, 2011) plus a margin ranging from 2.50% to 3.00%. The additional margin amount is dependent on the level of outstanding borrowings. As of December 31, 2011, the Company had $50.0 million of maximum borrowing capacity. An annual commitment fee of 0.30% is incurred on the unused portion of the line of credit.

The Company is required to comply with various financial covenants under the Credit Agreement. Specifically, the Company is required to maintain a ratio of earnings before interest, taxes, depreciation, and amortization ("EBITDA") plus stock compensation and minus income taxes paid and capital expenditures to interest expense and scheduled payments due for borrowings on a trailing three months basis annualized of not less than 2.00 to 1.00 and a ratio of current maturities of long-term debt to EBITDA plus stock compensation and minus income taxes paid and capital expenditures of not more than 2.75 to 1.00.