Concentration of Credit Risk	12 Months Ended
Dec. 31, 2019
Risks and Uncertainties [Abstract]
Concentration of Credit Risk	10. CONCENTRATIONS OF CREDIT RISK Deposits held in non-interest-bearing transaction accounts at the same institution are now aggregated with any interest-bearing deposits the owner may hold in the same ownership category, and the combined total insured up to at least $250,000. As of December 31, 2019 the Company had approximately $5,543,000 in checking and money market accounts at one bank, $6,091,000 at a second bank, $2,256,000 and $377,000 invested at two other banks. The Company also had approximately $1,150,000 of long-term certificates of deposit invested at these banks. Cash amounts on deposit at these institutions exceeded current per account FDIC protection limits by approximately $7,799,000. Most of the Company's business activity is located in Texas. Accounts receivable as of December 31, 2019 and 2018 are due from both individual and institutional owners of joint interests in oil and gas wells as well as purchasers of oil and natural gas. A portion of the Company's ability to collect these receivables is dependent upon revenues generated from sales of oil and natural gas produced by the related wells.

Concentration of Credit Risk

12 Months Ended

Dec. 31, 2019

10. CONCENTRATIONS OF CREDIT RISK

Deposits held in non-interest-bearing transaction accounts at the same institution are now aggregated with any interest-bearing deposits the owner may hold in the same ownership category, and the combined total insured up to at least $250,000.

As of December 31, 2019 the Company had approximately $5,543,000 in checking and money market accounts at one bank, $6,091,000 at a second bank, $2,256,000 and $377,000 invested at two other banks. The Company also had approximately $1,150,000 of long-term certificates of deposit invested at these banks. Cash amounts on deposit at these institutions exceeded current per account FDIC protection limits by approximately $7,799,000.

Most of the Company's business activity is located in Texas. Accounts receivable as of December 31, 2019 and 2018 are due from both individual and institutional owners of joint interests in oil and gas wells as well as purchasers of oil and natural gas. A portion of the Company's ability to collect these receivables is dependent upon revenues generated from sales of oil and natural gas produced by the related wells.