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Revolving Credit Facility	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Revolving Credit Facility	Revolving Credit Facility Our revolving credit facility ("BOK Revolver"), as amended, 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 $1.3 million. Borrowings available under the revolving credit facility at September 30, 2019 were $28.7 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, 2019 and December 31, 2018. The revolving credit facility expires on July 26, 2021. As of September 30, 2019, 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, 2019, our tangible net worth was $279.6 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. On October 24, 2019 we amended the BOK Revolver to allow for the occurrence of transactions associated with the New Markets Tax Credit transaction (Note 16). This amendment also removed section 8.1.4 which required our Chief Executive Officer, Norman Asbjornson, to maintain ownership of 25% of the Company. As Mr. Norman Asbjornson does not currently, and has not for several years maintained this level of ownership, a limited waiver of default was also added to the amendment.

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- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-URI http://asc.fasb.org/topic&trid=2208564

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