Loan and Security Agreement	12 Months Ended
Dec. 31, 2012
Loan and Security Agreement [Abstract]
Loan and Security Agreement	4. Loan and Security Agreement At December 31, 2012, we were a party to a loan and security agreement, as amended, the Loan Agreement with Silicon Valley Bank, or SVB, providing us with access to up to $15.0 million of financing in the form of revolving loans, letters of credit, foreign exchange contracts and cash management services such as merchant services, direct deposit of payroll, business credit card and check cashing services. On November 29, 2012 we executed a Third Loan Modification Agreement with SVB, which, among other things, waived our failure to comply with the Adjusted Quick Ratio financial covenant as of the months ended September 30, 2012 and October 31, 2012, revised the future Adjusted Quick Ratio covenant level and removed our ability to request financing for Inventory Placeholder Invoices. The Loan Agreement expired on March 29, 2013. Advances under the Loan Agreement could not exceed a borrowing base limit calculated using an advanced rate of 80% on our eligible accounts receivable, subject to certain reserves established by SVB and other adjustments. Interest on advances of credit under the Loan Agreement for financed accounts receivables were equal to SVB’s prime rate, which was 3.25% per annum at December 31, 2012, plus 3.0% per annum or, if we maintained at all times during any month an adjusted quick ratio of 2.0 to 1.0, then SVB’s prime rate plus 1.50% per annum. The minimum monthly interest charge was $6,000 per month. The Loan Agreement was secured by substantially all of our properties, rights and assets, including substantially all of our equipment, inventory, receivables, intellectual property and general intangibles. The Loan Agreement included customary representations and warranties for credit facilities of this type. In addition, the Loan Agreement contained a number of covenants that imposed significant operating and financial restrictions on our operations, including restrictions pertaining to, among other things: the condition of inventory; maintenance of an adjusted quick ratio of at least 1.25 to 1.0; intellectual property right protection and registration; dispositions of assets; changes in business, management, ownership or business locations; mergers, consolidations or acquisitions; incurrence or assumption of indebtedness; incurrence of liens on any of our property; paying dividends or making distributions on, or redemptions, retirements or repurchases of, capital stock; transactions with affiliates; and payments on or amendments to subordinated debt. At December 31, 2012 we were in compliance with all covenants except the Adjusted Quick Ratio covenant. The Loan Agreement also contained events of default customary for credit facilities of this type with, in some cases, corresponding grace periods, including, failure to pay any principal or interest when due, failure to comply with covenants, any material adverse change occurring, an attachment, levy or restraint on our business, certain bankruptcy or insolvency events , payment defaults relating to, or acceleration of, other indebtedness or that could result in a material adverse change to our business, we or our subsidiaries becoming subject to judgments, claims or liabilities in an amount individually or in aggregate in excess of $150,000, any misrepresentations, or any revocation, invalidation, breach or invalidation of any subordinated debt. As of December 31, 2012, $3.4 million was outstanding under the loan agreement. This amount was subsequently paid in full in January, 2013. In September 2011, we signed a letter of credit with SVB in the amount of $525,000. The standby letter of credit is required by the agreement negotiated between Air Products and Chemicals, Inc., or Air Products, and us to supply hydrogen infrastructure and hydrogen to Central Grocers at their distribution center. There are no collateral requirements associated with this letter of credit.

Loan and Security Agreement

12 Months Ended

Dec. 31, 2012

Loan and Security Agreement [Abstract]

4. Loan and Security Agreement

At December 31, 2012, we were a party to a loan and security agreement, as amended, the Loan Agreement with Silicon Valley Bank, or SVB, providing us with access to up to $15.0 million of financing in the form of revolving loans, letters of credit, foreign exchange contracts and cash management services such as merchant services, direct deposit of payroll, business credit card and check cashing services. On November 29, 2012 we executed a Third Loan Modification Agreement with SVB, which, among other things, waived our failure to comply with the Adjusted Quick Ratio financial covenant as of the months ended September 30, 2012 and October 31, 2012, revised the future Adjusted Quick Ratio covenant level and removed our ability to request financing for Inventory Placeholder Invoices. The Loan Agreement expired on March 29, 2013.

Advances under the Loan Agreement could not exceed a borrowing base limit calculated using an advanced rate of 80% on our eligible accounts receivable, subject to certain reserves established by SVB and other adjustments.

Interest on advances of credit under the Loan Agreement for financed accounts receivables were equal to SVB’s prime rate, which was 3.25% per annum at December 31, 2012, plus 3.0% per annum or, if we maintained at all times during any month an adjusted quick ratio of 2.0 to 1.0, then SVB’s prime rate plus 1.50% per annum. The minimum monthly interest charge was $6,000 per month.

The Loan Agreement was secured by substantially all of our properties, rights and assets, including substantially all of our equipment, inventory, receivables, intellectual property and general intangibles.

The Loan Agreement included customary representations and warranties for credit facilities of this type. In addition, the Loan Agreement contained a number of covenants that imposed significant operating and financial restrictions on our operations, including restrictions pertaining to, among other things: the condition of inventory; maintenance of an adjusted quick ratio of at least 1.25 to 1.0; intellectual property right protection and registration; dispositions of assets; changes in business, management, ownership or business locations; mergers, consolidations or acquisitions; incurrence or assumption of indebtedness; incurrence of liens on any of our property; paying dividends or making distributions on, or redemptions, retirements or repurchases of, capital stock; transactions with affiliates; and payments on or amendments to subordinated debt. At December 31, 2012 we were in compliance with all covenants except the Adjusted Quick Ratio covenant.

The Loan Agreement also contained events of default customary for credit facilities of this type with, in some cases, corresponding grace periods, including, failure to pay any principal or interest when due, failure to comply with covenants, any material adverse change occurring, an attachment, levy or restraint on our business, certain bankruptcy or insolvency events , payment defaults relating to, or acceleration of, other indebtedness or that could result in a material adverse change to our business, we or our subsidiaries becoming subject to judgments, claims or liabilities in an amount individually or in aggregate in excess of $150,000, any misrepresentations, or any revocation, invalidation, breach or invalidation of any subordinated debt.

As of December 31, 2012, $3.4 million was outstanding under the loan agreement. This amount was subsequently paid in full in January, 2013.

In September 2011, we signed a letter of credit with SVB in the amount of $525,000. The standby letter of credit is required by the agreement negotiated between Air Products and Chemicals, Inc., or Air Products, and us to supply hydrogen infrastructure and hydrogen to Central Grocers at their distribution center. There are no collateral requirements associated with this letter of credit.