Debt Financing	9 Months Ended
Sep. 30, 2019
Debt Disclosure [Abstract]
Debt Financing	Debt Financing On June 19, 2019, the Company entered into a Cash Collateral Security agreement with BMO Harris Bank, N.A. (the BMO Harris agreement) to use for the sole purpose of issuing standby letters of credit. The BMO Harris agreement requires us to pledge as cash collateral 105% of the aggregate face amount of outstanding standby letters of credit. The Company pays 250 basis points on the face values of outstanding letters of credit. There are no financial covenants set forth in the BMO Harris agreement. At September 30, 2019, the Company had outstanding standby letters of credit totaling approximately $2,361 under the BMO Harris agreement. As of September 30, 2019, the Company held $2,482 in a separate restricted use designated BMO Harris Bank N.A. deposit account. Fuel Tech is committed to reimbursing the issuing bank for any payments made by the bank under these instruments. In connection with the transition to BMO Harris Bank N.A., the Company canceled its U.S. Domestic credit facility with JPMorgan Chase Bank, N.A. effective on September 25, 2019.

Debt Financing

9 Months Ended

Sep. 30, 2019

On June 19, 2019, the Company entered into a Cash Collateral Security agreement with BMO Harris Bank, N.A. (the BMO Harris agreement) to use for the sole purpose of issuing standby letters of credit. The BMO Harris agreement requires us to pledge as cash collateral 105% of the aggregate face amount of outstanding standby letters of credit. The Company pays 250 basis points on the face values of outstanding letters of credit. There are no financial covenants set forth in the BMO Harris agreement. At September 30, 2019, the Company had outstanding standby letters of credit totaling approximately $2,361 under the BMO Harris agreement. As of September 30, 2019, the Company held $2,482 in a separate restricted use designated BMO Harris Bank N.A. deposit account. Fuel Tech is committed to reimbursing the issuing bank for any payments made by the bank under these instruments.

In connection with the transition to BMO Harris Bank N.A., the Company canceled its U.S. Domestic credit facility with JPMorgan Chase Bank, N.A. effective on September 25, 2019.