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Revolving Credit Facility	9 Months Ended
Revolving Credit Facility	Sep. 30, 2020
Debt Disclosure [Abstract]
Revolving Credit Facility	Revolving Credit Facility Our revolving credit facility, as amended, ("BOK Revolver") provides for maximum borrowings of $30.0 million, which is provided by BOKF, NA dba Bank of Oklahoma (“Bank of Oklahoma”). Under the line of credit, there is one standby letter of credit totaling $1.7 million. Borrowings available under the revolving credit facility at September 30, 2020 were $28.3 million. Interest on borrowings is payable monthly at LIBOR plus 2.0%. No fees are associated with the unused portion of the committed amount. We had no outstanding balance under the revolving credit facility at September 30, 2020 and December 31, 2019. The revolving credit facility expires on July 26, 2021. As of September 30, 2020, we were in compliance with our financial covenants. These covenants require that we meet certain parameters related to our tangible net worth and total liabilities to tangible net worth ratio. At September 30, 2020, our tangible net worth was $344.9 million and met the requirement of being at or above $175.0 million. Our total liabilities to tangible net worth ratio was 0.3 to 1, and met the requirement of not being above 2 to 1.