Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Current Assets
Cash	$ 795,332	$ 1,618,583
Cash-Restricted	873,355	33,821
Certificates of deposit	2,140,000	2,662,890
Accounts receivable	93,177	113,067
Prepaid expense and other assets	114,495	50,354
Total current assets	4,016,359	4,478,715
Non-current Assets
Certificates of deposit	2,185,000	950,000
Property and equipment:
Land	7,051,412	7,147,100
Property, plant, and equipment, net	9,219,388	9,295,022
Total assets	15,420,747	14,723,737
Current Liabilities
Trade payables and accrued expenses	140,735	207,166
Income tax payable	20,821	13,346
Total current liabilities	161,556	220,512
Non-current Liabilities
Deferred income tax payable	187,664	187,664
Total liabilities	349,220	408,176
Stockholders’ Equity
Common stock, no par value: 3,000,000 shares authorized;1,942,495 and 1,942,495 shares issued, respectively	59,335	59,335
Retained earnings	15,012,192	14,256,226
Total stockholders’ equity	15,071,527	14,315,561
Total liabilities and stockholders’ equity	15,420,747	14,723,737
Timber Properties [Member]
Property and equipment:
Property, plant, and equipment, net	2,134,230	2,119,180
Building and Equipment [Member]
Property and equipment:
Property, plant, and equipment, net	$ 33,746	$ 28,742

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.