Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Current assets
Cash and cash equivalents	$ 1,347,394	$ 1,695,158
Accounts receivable, net	1,271,854	1,418,235
Inventories	831,943	875,449
Prepaids and other current assets	466,143	636,491
Total current assets	3,917,334	4,625,333
Long-term assets
Restricted cash	1,505,537	1,492,227
Property, plant and equipment, net	3,836,839	3,689,895
Capitalized lease disposal costs, net	577,816	590,110
Operating lease right-of-use asset	2,797,086	2,846,143
Goodwill	1,384,255	1,384,255
Patents and other intangibles, net	3,169,006	3,208,669
Total long-term assets	13,270,539	13,211,299
Total assets	17,187,873	17,836,632
Current liabilities
Accounts payable	1,862,327	1,530,869
Accrued liabilities	1,658,492	1,704,431
Unearned revenue	593,948	388,931
Current portion of operating lease right-of-use liability	190,841	186,986
Total current liabilities	4,446,899	3,973,932
Long-term liabilities
Asset retirement obligation	1,637,429	1,618,467
Operating lease right-of-use liability, net of current portion	2,670,077	2,719,505
Mandatorily redeemable convertible preferred stock	4,063,000	4,063,000
Total long-term liabilities	10,094,628	10,169,953
Total liabilities	14,541,527	14,143,885
Stockholders' equity
Common stock, $0.01 par value; 750,000,000 shares authorized; 528,968,316 and 528,209,538 shares issued and outstanding, respectively	5,289,683	5,282,095
Additional paid in capital	126,934,036	126,639,939
Accumulated deficit	(129,577,373)	(128,229,287)
Total equity	2,646,346	3,692,747
Total liabilities and stockholders' equity	17,187,873	17,836,632
Nonrelated Party [Member]
Current liabilities
Current portion of notes payable	141,291	162,715
Long-term liabilities
Related party notes payable	104,122	148,981
Related Party [Member]
Long-term liabilities
Related party notes payable	$ 1,620,000	$ 1,620,000

Represents the amount of capitalized lease disposal costs, net.

No definition available.

Name:	inis_CapitalizedLeaseDisposalCostsNet
Namespace Prefix:	inis_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).