Balance Sheets - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Current Assets:
Cash	$ 1,618,583	$ 1,081,188
Cash-Restricted	33,821
Certificates of deposit	2,662,890	3,370,000
Accounts receivable	113,067	62,403
Prepaid expense and other assets	50,354	23,467
Total current assets	4,478,715	4,537,058
Non-current Assets
Certificates of deposit	950,000	720,000
Property and equipment:
Land	7,147,100	7,075,345
Property, plant, and equipment, net	9,295,022	9,161,266
Total assets	14,723,737	14,418,324
Current Liabilities:
Trade payables and accrued expenses	207,166	122,464
Income taxes payable	13,346	9,993
Total current liabilities	220,512	132,457
Non-current Liabilities:
Deferred income tax payable	187,664	298,919
Total liabilities	408,176	431,376
Stockholders’ Equity:
Common stock, no par value: 3,000,000 shares authorized; 1,942,495 shares issued and outstanding	59,335	59,335
Retained earnings	14,256,226	13,927,613
Total stockholders’ equity	14,315,561	13,986,948
Total liabilities and stockholders’ equity	14,723,737	14,418,324
Timber Properties [Member]
Property and equipment:
Property, plant, and equipment, net	2,119,180	2,072,368
Building and Equipment [Member]
Property and equipment:
Property, plant, and equipment, net	$ 28,742	$ 13,553

The carrying value of noncurrent assets classified as certificates of deposit.

No definition available.

Name:	ckx_CertificatesOfDepositAtCarryingValueNoncurrent
Namespace Prefix:	ckx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.